SPIFFIEST is a playable word

spiffy Scrabble® Dictionary

verb
spiffied, spiffying, spiffies
to make stylish
adjective
spiffier, spiffiest
stylish
(adverb) spiffily
109 Playable Words can be made from "SPIFFIEST"
   2-Letter Words (12 found)
   3-Letter Words (28 found)
   6-Letter Words (7 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)