RIMFIRE is a playable word

rimfire Scrabble® Dictionary

noun
pl. rimfires
a cartridge having the primer set in the rim of the shell
36 Playable Words can be made from "RIMFIRE"
   2-Letter Words (8 found)
   3-Letter Words (11 found)
   4-Letter Words (8 found)
   5-Letter Words (5 found)
   6-Letter Words (3 found)
   7-Letter Words (1 found)