letter-perfectˌletter-ˈperfect adjective American English 
correct in every detail: 
a letter-perfect product
correct in every detail: a letter-perfect product- unprintable
- unproductive
- unprofessional
- unprofessionally
- unprofitable
- unpromising
- unprompted
- unpronounceable
- unprotected
- unproven
- unprovoked
- unpublished
- unpunished
- unputdownable
- unqualified
- unquenchable
- unquestionable
- unquestionably
- unquestioned
- unquestioning
- Gaelic
- Gaelic football
- gaff
- gaffe
- gaffer