TAILFIN is a playable word

tailfin Scrabble® Dictionary

noun
pl. tailfins
a fin at the posterior end of a fish
63 Playable Words can be made from "TAILFIN"
   2-Letter Words (13 found)
   3-Letter Words (20 found)
   5-Letter Words (4 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)