FLATS is a playable word

flat Scrabble® Dictionary

adjective
flatter, flattest
having a smooth or even surface
verb
flatted, flatting, flats
to flatten
26 Playable Words can be made from "FLATS"
   2-Letter Words (6 found)
   3-Letter Words (11 found)
   4-Letter Words (8 found)
   5-Letter Words (1 found)