diff --git a/src/actions/GroupActions.js b/src/actions/GroupActions.js
index f3337eda25..d41d82d8bf 100644
--- a/src/actions/GroupActions.js
+++ b/src/actions/GroupActions.js
@@ -19,11 +19,11 @@ import { asyncAction } from './actionCreators';
 const GroupActions = {};
 
 /**
- * Create a GroupActions.fetchJoinedGroups action that represents an
- * asyncronous request to fetch the groups to which a user is joined.
+ * Create a  GroupActions.fetchJoinedGroups action that represents an
+ * asynchronous request to fetch the groups to which a user is joined.
  *
  * @param {MatrixClient} matrixClient the matrix client to query.
- * @returns {function} an asyncronous action of type
+ * @returns {function} an asynchronous action of type
  *                   GroupActions.fetchJoinedGroups.
  */
 GroupActions.fetchJoinedGroups = function(matrixClient) {
diff --git a/src/actions/TagOrderActions.js b/src/actions/TagOrderActions.js
index 00f724d9a2..038cda1b35 100644
--- a/src/actions/TagOrderActions.js
+++ b/src/actions/TagOrderActions.js
@@ -27,7 +27,7 @@ const TagOrderActions = {};
  *
  * @param {MatrixClient} matrixClient the matrix client to set the account
  *                                    data on.
- * @returns {function} an asyncronous action of type
+ * @returns {function} an asynchronous action of type
  *                   TagOrderActions.commitTagOrdering.
  */
 TagOrderActions.commitTagOrdering = function(matrixClient) {
diff --git a/src/actions/actionCreators.js b/src/actions/actionCreators.js
index 624401b9ce..bebd368f95 100644
--- a/src/actions/actionCreators.js
+++ b/src/actions/actionCreators.js
@@ -21,8 +21,8 @@ limitations under the License.
  *                    suffix determining whether it is pending, successful or
  *                    a failure.
  * @param {function} fn a function that returns a Promise.
- * @returns {function} an asyncronous action creator - a function that uses its
- *                     single argument as a dispatch function.
+ * @returns {function} an asynchronous action creator - a function that uses
+ *                     its single argument as a dispatch function.
  */
 export function asyncAction(id, fn) {
     return (dispatch) => {