phlo·gis·tic 
(flō-jĭstĭk)
(flō-jĭstĭk)adj.
1. Of or relating to phlogiston.
2. Of, relating to, or inducing inflammation or fever; inflammatory.
- unflinchingly
- unflinchingness
- unfocused
- unfocussed
- unfold
- unfoldment
- unforeseen
- unforgettability
- unforgettable
- unforgettableness
- unforgettably
- unforgivable
- unforgiving
- unformatted
- unformed
- unfortunate
- unfortunately
- unfounded
- unfoundedly
- unfoundedness
- unfreeze
- unfrequented
- unfriend
- unfriended
- unfriendliness