diff --git a/packages/@aws-cdk/aws-iot-actions-alpha/lib/firehose-put-record-action.ts b/packages/@aws-cdk/aws-iot-actions-alpha/lib/firehose-put-record-action.ts
index d8786c9e69a1a..de05aa06ac335 100644
--- a/packages/@aws-cdk/aws-iot-actions-alpha/lib/firehose-put-record-action.ts
+++ b/packages/@aws-cdk/aws-iot-actions-alpha/lib/firehose-put-record-action.ts
@@ -24,7 +24,7 @@ export enum FirehoseRecordSeparator {
   WINDOWS_NEWLINE = '\r\n',
 
   /**
-   * Separate by a commma
+   * Separate by a comma
    */
   COMMA = ',',
 }
diff --git a/packages/@aws-cdk/aws-iot-actions-alpha/lib/kinesis-put-record-action.ts b/packages/@aws-cdk/aws-iot-actions-alpha/lib/kinesis-put-record-action.ts
index a91275ee48ae4..3a9af8969969e 100644
--- a/packages/@aws-cdk/aws-iot-actions-alpha/lib/kinesis-put-record-action.ts
+++ b/packages/@aws-cdk/aws-iot-actions-alpha/lib/kinesis-put-record-action.ts
@@ -14,7 +14,7 @@ export interface KinesisPutRecordActionProps extends CommonActionProps {
    *
    * @see https://docs.aws.amazon.com/iot/latest/developerguide/iot-substitution-templates.html
    *
-   * You can use the expression '${newuuid()}' if your payload does not have a high cardinarity property.
+   * You can use the expression '${newuuid()}' if your payload does not have a high cardinality property.
    * If you use empty string, this action use no partition key and all records will put same one shard.
    *
    * @see https://docs.aws.amazon.com/kinesis/latest/APIReference/API_PutRecord.html#API_PutRecord_RequestParameters
diff --git a/packages/@aws-cdk/aws-iot-actions-alpha/lib/step-functions-state-machine-action.ts b/packages/@aws-cdk/aws-iot-actions-alpha/lib/step-functions-state-machine-action.ts
index 30c8641148a28..b0b9a6d8a9785 100644
--- a/packages/@aws-cdk/aws-iot-actions-alpha/lib/step-functions-state-machine-action.ts
+++ b/packages/@aws-cdk/aws-iot-actions-alpha/lib/step-functions-state-machine-action.ts
@@ -28,7 +28,7 @@ export class StepFunctionsStateMachineAction implements iot.IAction {
   private readonly role?: iam.IRole;
 
   /**
-   * @param stateMachine The Step Functions Start Machine which shoud be executed.
+   * @param stateMachine The Step Functions Start Machine which should be executed.
    * @param props Optional properties to not use default
    */
   constructor(private readonly stateMachine: stepfunctions.IStateMachine, props?: StepFunctionsStateMachineActionProps) {
diff --git a/packages/@aws-cdk/aws-iot-actions-alpha/test/kinesis-firehose/firehose-put-record-action.test.ts b/packages/@aws-cdk/aws-iot-actions-alpha/test/kinesis-firehose/firehose-put-record-action.test.ts
index fdf857021b1a7..143ced08912a3 100644
--- a/packages/@aws-cdk/aws-iot-actions-alpha/test/kinesis-firehose/firehose-put-record-action.test.ts
+++ b/packages/@aws-cdk/aws-iot-actions-alpha/test/kinesis-firehose/firehose-put-record-action.test.ts
@@ -90,7 +90,7 @@ test('can set batchMode', () => {
   });
 });
 
-test('can set separotor', () => {
+test('can set separator', () => {
   // GIVEN
   const stack = new cdk.Stack();
   const topicRule = new iot.TopicRule(stack, 'MyTopicRule', {