os·ten·ta·tious 
(ŏs′tĕn-tāshəs, -tən-)
(ŏs′tĕn-tāshəs, -tən-)adj.
Characterized by or given to ostentation. See Synonyms at showy.
os′ten·tatious·ly adv.
- unforgettability
- unforgettable
- unforgettableness
- unforgettably
- unforgivable
- unforgiving
- unformatted
- unformed
- unfortunate
- unfortunately
- unfounded
- unfoundedly
- unfoundedness
- unfreeze
- unfrequented
- unfriend
- unfriended
- unfriendliness
- unfriendly
- unfrock
- unfruitful
- unfruitfully
- unfruitfulness
- unfunded
- unfunny