SWIMMIEST is a playable word

swimmy Scrabble® Dictionary

adjective
swimmier, swimmiest
dizzy
(adverb) swimmily
111 Playable Words can be made from "SWIMMIEST"
   2-Letter Words (13 found)
   3-Letter Words (23 found)
   6-Letter Words (7 found)
   7-Letter Words (5 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)