diff --git a/python/gui/editorwidgets/qgsdefaultsearchwidgetwrapper.sip b/python/gui/editorwidgets/qgsdefaultsearchwidgetwrapper.sip
index e7b5a853667..52636c9547f 100644
--- a/python/gui/editorwidgets/qgsdefaultsearchwidgetwrapper.sip
+++ b/python/gui/editorwidgets/qgsdefaultsearchwidgetwrapper.sip
@@ -63,7 +63,7 @@ class QgsDefaultSearchWidgetWrapper : QgsSearchWidgetWrapper
 
     QCheckBox *caseSensitiveCheckBox();
 %Docstring
- Returns a pointer to the case sensitivity check box in the widget.
+ Returns a pointer to the case sensitivity checkbox in the widget.
 .. note::
 
    this method is in place for unit testing only, and is not considered
diff --git a/python/gui/effects/qgseffectstackpropertieswidget.sip b/python/gui/effects/qgseffectstackpropertieswidget.sip
index 4fbb780c7d0..74fd3e28cba 100644
--- a/python/gui/effects/qgseffectstackpropertieswidget.sip
+++ b/python/gui/effects/qgseffectstackpropertieswidget.sip
@@ -170,7 +170,7 @@ class QgsEffectStackPropertiesDialog: QgsDialog
 class QgsEffectStackCompactWidget: QgsPanelWidget
 {
 %Docstring
- A small widget consisting of a check box for enabling/disabling an effect stack
+ A small widget consisting of a checkbox for enabling/disabling an effect stack
  and a button for opening an effect stack customisation dialog.
 
 .. versionadded:: 2.9
diff --git a/resources/context_help/QgsDecorationCopyrightDialog b/resources/context_help/QgsDecorationCopyrightDialog
index 81d2575c74d..c1082051932 100644
--- a/resources/context_help/QgsDecorationCopyrightDialog
+++ b/resources/context_help/QgsDecorationCopyrightDialog
@@ -13,7 +13,7 @@ You can add any random text to the map not only a copyright label.
 <li>Click on <label>View > Decorations > Copyright Label</label>.
 <li>Enter the text you want to place on the map. You can use HTML.
 <li>Choose the placement of the label from the <label>Placement Bottom Right</label> drop-down box.
-<li>Make sure the <label>Enable Copyright Label check box</label> is checked.
+<li>Make sure the <label>Enable Copyright Label checkbox</label> is checked.
 <li>Click <label>OK</label>.
 </ol>
 <a name="text">
diff --git a/resources/context_help/QgsNewSpatialiteLayerDialog b/resources/context_help/QgsNewSpatialiteLayerDialog
index 6bf2490f039..0a15c162b88 100644
--- a/resources/context_help/QgsNewSpatialiteLayerDialog
+++ b/resources/context_help/QgsNewSpatialiteLayerDialog
@@ -11,7 +11,7 @@ Choose the type of layer you want to create.
 <h4>EPSG SRID</h4>
 Enter the EPSG number for the spatial reference id (SRID). By default the SRID for WGS 84 is filled in for you. Click on <label>Find SRID</label> button to change the coordinate reference system of the layer if needed. The SRID must exist within the spatial_ref_sys in your SpatiaLite database. You can search for the SRID using partial matches on both name and SRID.
 <h4>Create an auto-incrementing Primary Key</h4>
-Clicking this check box will add a primary key to the new layer. This key field will be auto-incrementing, meaning you don't have to enter a value for it when adding features to the attribute table of the layer.
+Clicking this checkbox will add a primary key to the new layer. This key field will be auto-incrementing, meaning you don't have to enter a value for it when adding features to the attribute table of the layer.
 <h4>New attribute</h4>
 Add the desired attributes by clicking on the <label>Add to attributes list</label> button after you have specified a name and type for the attribute. Only real, integer, and string attributes are supported.<br/>
 Width and precision are irrelevant in a SpatiaLite database so you do not have to specify these.
diff --git a/resources/context_help/QgsOptions b/resources/context_help/QgsOptions
index 9b9615155c3..ceb734c5a2e 100644
--- a/resources/context_help/QgsOptions
+++ b/resources/context_help/QgsOptions
@@ -28,7 +28,7 @@ By default, QGIS renders all visible layers whenever the map canvas must be refr
 </ul>
 QGIS allows you to control the rendering process in a number of ways:<p>
 You can set an option to always load new layers without drawing them.<br>
-This means the layer will be added to the map, but its visibility check box in the legend will be unchecked by default. To set this option, uncheck the <label>By default new layers added to the map should be displayed</label> check box.<p>
+This means the layer will be added to the map, but its visibility checkbox in the legend will be unchecked by default. To set this option, uncheck the <label>By default new layers added to the map should be displayed</label> checkbox.<p>
 You can set an option to update the map display as features are drawn. <br>
 By default, QGIS does not display any features for a layer until the entire layer has been rendered. To update the display as features are read from the data store, set the <label>Number of features to draw before updating the display</label> to an appropriate value. Setting a value of 0 disables update during drawing (this is the default). Setting a value too low will result in poor performance as the map canvas is continually updated during the reading of the features. A suggested value to start with is 500.
 <a name="map">
diff --git a/resources/context_help/QgsProjectProperties b/resources/context_help/QgsProjectProperties
index e7a9de06aff..d2ef3fc4edb 100644
--- a/resources/context_help/QgsProjectProperties
+++ b/resources/context_help/QgsProjectProperties
@@ -109,7 +109,7 @@
 </p>
 <p>
   To use 'on the fly' CRS transformation, click the <label>Enable 'on the fly'
-  CRS transformation</label> check box. Then choose the projection for the
+  CRS transformation</label> checkbox. Then choose the projection for the
   project (map canvas) from the list of Geographic or Projected coordinate
   systems.
 </p>
diff --git a/resources/context_help/QgsVectorLayerProperties b/resources/context_help/QgsVectorLayerProperties
index 7db327cb82b..72f3681eb85 100644
--- a/resources/context_help/QgsVectorLayerProperties
+++ b/resources/context_help/QgsVectorLayerProperties
@@ -38,7 +38,7 @@ If you wish to always use a particular style whenever the layer is loaded, use t
 <h4>Labels</h4>
 </a>
 The Labels tab allows you to enable labeling features and control a number of options related to fonts, placement, style, alignment and buffering.<br/>
-Check the <label>Display labels</label> check box to enable labeling.
+Check the <label>Display labels</label> checkbox to enable labeling.
 
 <h5>Basic Label options</h5>
 Choose the field to label with.<p>
@@ -54,7 +54,7 @@ The <label>Font size units</label> allows you to select between <label>Points</l
 <h5>Buffer labels</h5>
 To buffer the labels means putting a backdrop around them to make them stand out better. To buffer the lakes labels:
 <ol>
-<li>Click the <label>Buffer Labels</label> check box to enable buffering.
+<li>Click the <label>Buffer Labels</label> checkbox to enable buffering.
 <li>Choose a size for the buffer using the spin box.
 <li>Choose a color by clicking on <label>Color</label> and choosing your favorite from the color selector. You can also set some transparency for the buffer if you prefer.
 <li>Click <label>Apply</label> to see if you like the changes.
@@ -82,7 +82,7 @@ Within the Attributes tab you also find an edit widget column. This column can b
 <li><label>Enumeration</label> Opens a combo box with values that can be used within the columns type. This is currently only supported by the Postgres provider.
 <li><label>Immutable</label> The immutable attribute column is read-only. The user is not able to modify the content.
 <li><label>Hidden</label> A hidden attribute column is invisible to the user.
-<li><label>Checkbox</label> A check box is shown.  The value representing the state of the check box in the attribute has to be entered.
+<li><label>Checkbox</label> A checkbox is shown.  The value representing the state of the checkbox in the attribute has to be entered.
 <li><label>Text edit</label> A text edit field is shown, that allows entering multiline text.
 </ul>
 
diff --git a/scripts/spell_check/spelling.dat b/scripts/spell_check/spelling.dat
index 991319c2aee..ba8be6a92ed 100644
--- a/scripts/spell_check/spelling.dat
+++ b/scripts/spell_check/spelling.dat
@@ -1235,6 +1235,7 @@ chceked:checked
 chceking:checking
 chceks:checks
 check-box:checkbox
+check box:checkbox
 checkk:check
 checksuming:checksumming
 cheif:chief
@@ -3297,6 +3298,7 @@ heathy:healthy
 Heidelburg:Heidelberg
 heigh:height
 heigher:higher
+heighest:highest
 heigt:height
 heigth:height
 heirachies:hierarchies
diff --git a/src/app/composer/qgscomposermapwidget.cpp b/src/app/composer/qgscomposermapwidget.cpp
index 58e3eaa0ba4..869de892114 100644
--- a/src/app/composer/qgscomposermapwidget.cpp
+++ b/src/app/composer/qgscomposermapwidget.cpp
@@ -596,13 +596,13 @@ void QgsComposerMapWidget::updateGuiElements()
 
   mMapRotationSpinBox->setValue( mComposerMap->mapRotation( QgsComposerObject::OriginalValue ) );
 
-  // follow preset check box
+  // follow preset checkbox
   mFollowVisibilityPresetCheckBox->setCheckState(
     mComposerMap->followVisibilityPreset() ? Qt::Checked : Qt::Unchecked );
   int presetModelIndex = mFollowVisibilityPresetCombo->findText( mComposerMap->followVisibilityPresetName() );
   mFollowVisibilityPresetCombo->setCurrentIndex( presetModelIndex != -1 ? presetModelIndex : 0 ); // 0 == none
 
-  //keep layer list check box
+  //keep layer list checkbox
   if ( mComposerMap->keepLayerSet() )
   {
     mKeepLayerListCheckBox->setCheckState( Qt::Checked );
@@ -1185,7 +1185,7 @@ void QgsComposerMapWidget::on_mGridListWidget_itemChanged( QListWidgetItem *item
   grid->setName( item->text() );
   if ( item->isSelected() )
   {
-    //update check box title if item is current item
+    //update checkbox title if item is current item
     mDrawGridCheckBox->setText( QString( tr( "Draw \"%1\" grid" ) ).arg( grid->name() ) );
   }
 }
@@ -1397,7 +1397,7 @@ void QgsComposerMapWidget::on_mOverviewListWidget_itemChanged( QListWidgetItem *
   overview->setName( item->text() );
   if ( item->isSelected() )
   {
-    //update check box title if item is current item
+    //update checkbox title if item is current item
     mOverviewCheckBox->setTitle( QString( tr( "Draw \"%1\" overview" ) ).arg( overview->name() ) );
   }
 }
diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
index ebb05d6a16c..330ef9217ff 100644
--- a/src/app/qgisapp.cpp
+++ b/src/app/qgisapp.cpp
@@ -3381,7 +3381,7 @@ void QgisApp::addUserInputWidget( QWidget *widget )
 
 void QgisApp::initLayerTreeView()
 {
-  mLayerTreeView->setWhatsThis( tr( "Map legend that displays all the layers currently on the map canvas. Click on the check box to turn a layer on or off. Double click on a layer in the legend to customize its appearance and set other properties." ) );
+  mLayerTreeView->setWhatsThis( tr( "Map legend that displays all the layers currently on the map canvas. Click on the checkbox to turn a layer on or off. Double click on a layer in the legend to customize its appearance and set other properties." ) );
 
   mLayerTreeDock = new QgsDockWidget( tr( "Layers Panel" ), this );
   mLayerTreeDock->setObjectName( QStringLiteral( "Layers" ) );
diff --git a/src/app/qgsdecorationnortharrow.cpp b/src/app/qgsdecorationnortharrow.cpp
index df84daecd5d..9a95c5f4142 100644
--- a/src/app/qgsdecorationnortharrow.cpp
+++ b/src/app/qgsdecorationnortharrow.cpp
@@ -105,7 +105,7 @@ void QgsDecorationNorthArrow::run()
 void QgsDecorationNorthArrow::render( const QgsMapSettings &mapSettings, QgsRenderContext &context )
 {
 
-  //Large IF statement controlled by enable check box
+  //Large IF statement controlled by enable checkbox
   if ( enabled() )
   {
     QSize size( 64, 64 );
diff --git a/src/core/composer/qgscomposermodel.h b/src/core/composer/qgscomposermodel.h
index 1e3dd3f1da6..26deedd5f59 100644
--- a/src/core/composer/qgscomposermodel.h
+++ b/src/core/composer/qgscomposermodel.h
@@ -56,8 +56,8 @@ class CORE_EXPORT QgsComposerModel: public QAbstractItemModel
     //! Columns returned by the model
     enum Columns
     {
-      Visibility = 0, //!< Item visibility check box
-      LockStatus, //!< Item lock status check box
+      Visibility = 0, //!< Item visibility checkbox
+      LockStatus, //!< Item lock status checkbox
       ItemId, //!< Item ID
     };
 
diff --git a/src/core/layertree/qgslayertreemodel.h b/src/core/layertree/qgslayertreemodel.h
index 43db0bf2b35..14950eb734c 100644
--- a/src/core/layertree/qgslayertreemodel.h
+++ b/src/core/layertree/qgslayertreemodel.h
@@ -100,7 +100,7 @@ class CORE_EXPORT QgsLayerTreeModel : public QAbstractItemModel
       // behavioral flags
       AllowNodeReorder           = 0x1000,  //!< Allow reordering with drag'n'drop
       AllowNodeRename            = 0x2000,  //!< Allow renaming of groups and layers
-      AllowNodeChangeVisibility  = 0x4000,  //!< Allow user to set node visibility with a check box
+      AllowNodeChangeVisibility  = 0x4000,  //!< Allow user to set node visibility with a checkbox
       AllowLegendChangeState     = 0x8000,  //!< Allow check boxes for legend nodes (if supported by layer's legend)
       ActionHierarchical         = 0x10000, //!< Check/uncheck action has consequences on children (or parents for leaf node)
     };
diff --git a/src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp b/src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp
index eae90e3e0ac..fc33892196f 100644
--- a/src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp
+++ b/src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp
@@ -49,7 +49,7 @@ void QgsEditorWidgetRegistry::initEditors( QgsMapCanvas *mapCanvas, QgsMessageBa
   registerWidget( QStringLiteral( "ValueMap" ), new QgsValueMapWidgetFactory( tr( "Value Map" ) ) );
   registerWidget( QStringLiteral( "Enumeration" ), new QgsEnumerationWidgetFactory( tr( "Enumeration" ) ) );
   registerWidget( QStringLiteral( "Hidden" ), new QgsHiddenWidgetFactory( tr( "Hidden" ) ) );
-  registerWidget( QStringLiteral( "CheckBox" ), new QgsCheckboxWidgetFactory( tr( "Check Box" ) ) );
+  registerWidget( QStringLiteral( "CheckBox" ), new QgsCheckboxWidgetFactory( tr( "Checkbox" ) ) );
   registerWidget( QStringLiteral( "ValueRelation" ), new QgsValueRelationWidgetFactory( tr( "Value Relation" ) ) );
   registerWidget( QStringLiteral( "UuidGenerator" ), new QgsUuidWidgetFactory( tr( "Uuid Generator" ) ) );
   registerWidget( QStringLiteral( "Color" ), new QgsColorWidgetFactory( tr( "Color" ) ) );
@@ -186,7 +186,7 @@ bool QgsEditorWidgetRegistry::registerWidget( const QString &widgetId, QgsEditor
   {
     mWidgetFactories.insert( widgetId, widgetFactory );
 
-    // Use this factory as default where it provides the heighest priority
+    // Use this factory as default where it provides the highest priority
     QHash<const char *, int> types = widgetFactory->supportedWidgetTypes();
     QHash<const char *, int>::ConstIterator it;
     it = types.constBegin();
diff --git a/src/gui/editorwidgets/qgsdefaultsearchwidgetwrapper.h b/src/gui/editorwidgets/qgsdefaultsearchwidgetwrapper.h
index eda513e052f..ee33e2c9cce 100644
--- a/src/gui/editorwidgets/qgsdefaultsearchwidgetwrapper.h
+++ b/src/gui/editorwidgets/qgsdefaultsearchwidgetwrapper.h
@@ -66,7 +66,7 @@ class GUI_EXPORT QgsDefaultSearchWidgetWrapper : public QgsSearchWidgetWrapper
      */
     QgsFilterLineEdit *lineEdit();
 
-    /** Returns a pointer to the case sensitivity check box in the widget.
+    /** Returns a pointer to the case sensitivity checkbox in the widget.
      * \note this method is in place for unit testing only, and is not considered
      * stable API
      */
diff --git a/src/gui/effects/qgseffectstackpropertieswidget.h b/src/gui/effects/qgseffectstackpropertieswidget.h
index 2b06b9c203f..009b441f944 100644
--- a/src/gui/effects/qgseffectstackpropertieswidget.h
+++ b/src/gui/effects/qgseffectstackpropertieswidget.h
@@ -179,7 +179,7 @@ class GUI_EXPORT QgsEffectStackPropertiesDialog: public QgsDialog
 
 /** \ingroup gui
  * \class QgsEffectStackCompactWidget
- * \brief A small widget consisting of a check box for enabling/disabling an effect stack
+ * \brief A small widget consisting of a checkbox for enabling/disabling an effect stack
  * and a button for opening an effect stack customisation dialog.
  *
  * \since QGIS 2.9
diff --git a/src/gui/qgsdetaileditemdelegate.cpp b/src/gui/qgsdetaileditemdelegate.cpp
index d49787df529..bef229c036a 100644
--- a/src/gui/qgsdetaileditemdelegate.cpp
+++ b/src/gui/qgsdetaileditemdelegate.cpp
@@ -97,7 +97,7 @@ void QgsDetailedItemDelegate::paintManually( QPainter *thepPainter,
     const QgsDetailedItemData &data ) const
 {
   //
-  // Get the strings and check box properties
+  // Get the strings and checkbox properties
   //
   //bool myCheckState = index.model()->data(theIndex, Qt::CheckStateRole).toBool();
   mpCheckBox->setChecked( data.isChecked() );
diff --git a/src/gui/qgsmessageviewer.h b/src/gui/qgsmessageviewer.h
index 8886a46d92d..f6865565a63 100644
--- a/src/gui/qgsmessageviewer.h
+++ b/src/gui/qgsmessageviewer.h
@@ -54,7 +54,7 @@ class GUI_EXPORT QgsMessageViewer: public QDialog, public QgsMessageOutput, priv
     // A checkbox that can be used for something like
     // "don't show this message again"
     void setCheckBoxText( const QString &text );
-    // Make the check box visible/invisible
+    // Make the checkbox visible/invisible
     void setCheckBoxVisible( bool visible );
     // Sets the check state
     void setCheckBoxState( Qt::CheckState state );
diff --git a/src/plugins/evis/eventbrowser/evisgenericeventbrowsergui.cpp b/src/plugins/evis/eventbrowser/evisgenericeventbrowsergui.cpp
index b5a0bdba4c2..53bec4a7845 100644
--- a/src/plugins/evis/eventbrowser/evisgenericeventbrowsergui.cpp
+++ b/src/plugins/evis/eventbrowser/evisgenericeventbrowsergui.cpp
@@ -806,7 +806,7 @@ void eVisGenericEventBrowserGui::on_buttonboxOptions_clicked( QAbstractButton *b
 }
 
 /**
- * Slot called when the state changes for the chkboxApplyPathRulesToDocs check box.
+ * Slot called when the state changes for the chkboxApplyPathRulesToDocs checkbox.
  * @param state - The new state of the checkbox
  */
 void eVisGenericEventBrowserGui::on_chkboxApplyPathRulesToDocs_stateChanged( int state )
@@ -911,7 +911,7 @@ void eVisGenericEventBrowserGui::on_chkboxDisplayCompassBearing_stateChanged( in
 }
 
 /**
- * Slot called when the state changes for the chkboxEventImagePathRelative check box.
+ * Slot called when the state changes for the chkboxEventImagePathRelative checkbox.
  * @param state - The new state of the checkbox
  */
 void eVisGenericEventBrowserGui::on_chkboxEventImagePathRelative_stateChanged( int state )
@@ -927,7 +927,7 @@ void eVisGenericEventBrowserGui::on_chkboxEventImagePathRelative_stateChanged( i
 }
 
 /**
- * Slot called when the state changes for the chkboxUseOnlyFilename check box.
+ * Slot called when the state changes for the chkboxUseOnlyFilename checkbox.
  * @param state - The new state of the checkbox
  */
 void eVisGenericEventBrowserGui::on_chkboxUseOnlyFilename_stateChanged( int state )
diff --git a/src/providers/wms/qgsxyzconnectiondialog.cpp b/src/providers/wms/qgsxyzconnectiondialog.cpp
index c9f05397671..fce172a1539 100644
--- a/src/providers/wms/qgsxyzconnectiondialog.cpp
+++ b/src/providers/wms/qgsxyzconnectiondialog.cpp
@@ -22,7 +22,7 @@ QgsXyzConnectionDialog::QgsXyzConnectionDialog( QWidget *parent )
 {
   setupUi( this );
 
-  // Behavior for min and max zoom check box
+  // Behavior for min and max zoom checkbox
   connect( mCheckBoxZMin, &QCheckBox::toggled, mSpinZMin, &QSpinBox::setEnabled );
   connect( mCheckBoxZMax, &QCheckBox::toggled, mSpinZMax, &QSpinBox::setEnabled );
 }