FLATCAP is a playable word

flatcap Scrabble® Dictionary

noun
pl. flatcaps
a type of hat
43 Playable Words can be made from "FLATCAP"
   2-Letter Words (7 found)
   3-Letter Words (18 found)
   4-Letter Words (14 found)
   5-Letter Words (3 found)
   7-Letter Words (1 found)