- A or An?
- Affect or Effect?
- Altogether or All Together?
- Amount or Number?
- As or Like?
- Bad or Badly?
- Brake or Break?
- Fewer or Less?
- Good or Well?
- Irritate or Aggravate?
- Lie or Lay?
- Plain or Plane?
- Principal or Principle?
- Rise or Raise?
- Sit or Set?
- Than or Then?
- Who or Whom?
