FIRMER is a playable word

firmer Scrabble® Dictionary

noun
pl. firmers
a woodworking tool
32 Playable Words can be made from "FIRMER"
   2-Letter Words (8 found)
   3-Letter Words (11 found)
   4-Letter Words (7 found)
   5-Letter Words (5 found)
   6-Letter Words (1 found)