diff --git a/blocks/api/registration.js b/blocks/api/registration.js
index 0afbb701e5dcd..80860c8fc35b4 100644
--- a/blocks/api/registration.js
+++ b/blocks/api/registration.js
@@ -205,7 +205,7 @@ export function getBlockTypes() {
 /**
  * Returns true if the block defines support for a feature, or false otherwise.
  *
- * @param {(String|Object)} nameOrType      Block name or type object.
+ * @param {(string|Object)} nameOrType      Block name or type object.
  * @param {string}          feature         Feature to test.
  * @param {boolean}         defaultSupports Whether feature is supported by
  *                                          default if not explicitly defined.
diff --git a/blocks/api/serializer.js b/blocks/api/serializer.js
index 29fc911efc255..da93b99f2bf73 100644
--- a/blocks/api/serializer.js
+++ b/blocks/api/serializer.js
@@ -98,10 +98,10 @@ export function getSaveContent( blockType, attributes ) {
  * This function returns only those attributes which are needed to persist and
  * which cannot be matched from the block content.
  *
- * @param {Object<String,*>} allAttributes Attributes from in-memory block data.
- * @param {Object<String,*>} blockType     Block type.
+ * @param {Object<string,*>} allAttributes Attributes from in-memory block data.
+ * @param {Object<string,*>} blockType     Block type.
  *
- * @returns {Object<String,*>} Subset of attributes for comment serialization.
+ * @returns {Object<string,*>} Subset of attributes for comment serialization.
  */
 export function getCommentAttributes( allAttributes, blockType ) {
 	const attributes = reduce( blockType.attributes, ( result, attributeSchema, key ) => {
diff --git a/blocks/media-upload/index.js b/blocks/media-upload/index.js
index 287b999770059..f83b75fa46db0 100644
--- a/blocks/media-upload/index.js
+++ b/blocks/media-upload/index.js
@@ -19,7 +19,7 @@ const getGalleryDetailsMediaFrame = () => {
 		/**
 		 * Create the default states.
 		 *
-		 * @returns {void} Void.
+		 * @returns {void}
 		 */
 		createStates: function createStates() {
 			this.states.add( [
diff --git a/components/autocomplete/test/index.js b/components/autocomplete/test/index.js
index 505ba6e62fea9..9b71e1258fba4 100644
--- a/components/autocomplete/test/index.js
+++ b/components/autocomplete/test/index.js
@@ -82,7 +82,7 @@ function par( /* arguments */ ) {
  * @param {*}              wrapper        Enzyme wrapper around react node
  *                                        containing  a FakeEditor.
  * @param {Array.<Node>}   nodeList       Array of dom nodes.
- * @param {Array.<Number>} cursorPosition Array specifying the child indexes and
+ * @param {Array.<number>} cursorPosition Array specifying the child indexes and
  *                                        offset of the cursor.
  */
 function simulateInput( wrapper, nodeList, cursorPosition ) {
diff --git a/data/index.js b/data/index.js
index f0d14228bd1bd..70b2045647226 100644
--- a/data/index.js
+++ b/data/index.js
@@ -69,7 +69,7 @@ export function registerSelectors( reducerKey, newSelectors ) {
  *                                       to determine the data for the
  *                                       component.
  *
- * @returns {Func} Renders the wrapped component and passes it data.
+ * @returns {Function} Renders the wrapped component and passes it data.
  */
 export const query = ( mapSelectorsToProps ) => ( WrappedComponent ) => {
 	const connectWithStore = ( ...args ) => {
diff --git a/editor/store/actions.js b/editor/store/actions.js
index 9529b00ac8ee3..93cfba9099a21 100644
--- a/editor/store/actions.js
+++ b/editor/store/actions.js
@@ -161,7 +161,7 @@ export function toggleSelection( isSelectionEnabled = true ) {
  * Returns an action object signalling that a blocks should be replaced with
  * one or more replacement blocks.
  *
- * @param {(String|String[])} uids   Block UID(s) to replace.
+ * @param {(string|string[])} uids   Block UID(s) to replace.
  * @param {(Object|Object[])} blocks Replacement block(s).
  *
  * @returns {Object} Action object.
@@ -178,7 +178,7 @@ export function replaceBlocks( uids, blocks ) {
  * Returns an action object signalling that a single block should be replaced
  * with one or more replacement blocks.
  *
- * @param {(String|String[])} uid   Block UID(s) to replace.
+ * @param {(string|string[])} uid   Block UID(s) to replace.
  * @param {(Object|Object[])} block Replacement block(s).
  *
  * @returns {Object} Action object.
@@ -351,7 +351,7 @@ export function stopTyping() {
  *
  * @param {string}   sidebar     Name of the sidebar to toggle
  *                               (desktop, mobile or publish).
- * @param {Boolean?} forcedValue Force a sidebar state.
+ * @param {boolean?} forcedValue Force a sidebar state.
  *
  * @returns {Object} Action object.
  */
diff --git a/editor/utils/dom.js b/editor/utils/dom.js
index eed1b7028804b..c491ca9f1d70e 100644
--- a/editor/utils/dom.js
+++ b/editor/utils/dom.js
@@ -201,8 +201,8 @@ export function placeCaretAtHorizontalEdge( container, isReverse ) {
  * @see https://developer.mozilla.org/en-US/docs/Web/API/Document/caretRangeFromPoint
  *
  * @param {Document} doc The document of the range.
- * @param {Float}    x   Horizontal position within the current viewport.
- * @param {Float}    y   Vertical position within the current viewport.
+ * @param {number}    x   Horizontal position within the current viewport.
+ * @param {number}    y   Vertical position within the current viewport.
  *
  * @returns {?Range} The best range for the given point.
  */
@@ -230,8 +230,8 @@ function caretRangeFromPoint( doc, x, y ) {
  * This is preferred over getting the UI nodes and set styles there.
  *
  * @param {Document} doc       The document of the range.
- * @param {Float}    x         Horizontal position within the current viewport.
- * @param {Float}    y         Vertical position within the current viewport.
+ * @param {number}    x         Horizontal position within the current viewport.
+ * @param {number}    y         Vertical position within the current viewport.
  * @param {Element}  container Container in which the range is expected to be found.
  *
  * @returns {?Range} The best range for the given point.