- deep
- deepen
- deepened
- depend
- depended
- dope
- doped
- dupe
- duped
- epee
- epode
- expend
- expended
- expo
- expound
- expounded
- nope
- open
- opened
- peed
- peen
- peep
- peeped
- pend
- pended
- penne
- penned
- peon
- pepped
- pond
- pone
- poop
- pooped
- pope
- popped
- pound
- pounded
- punned
- unopen
- unopened
- unpen
- unpenned
- updo
- upend
- upended
- upon
- upped