unfa - valv
- unfair exchange
- unfair game
- unfamiliar aerodrome
- unfavourable conditions
- unfavourable reaction
- unfavourable terms
- unfeather
- unfeathering
- unfed
- unfinned
- unfit for action
- unflanged
- unflared
- unforeseeable development
- unforeseeable situation
- unformatted
- unformatted capacity
- unforseeable
- unfortified
- unfounded allegation
