COULOMB is a playable word

coulomb Scrabble® Dictionary

noun
pl. coulombs
an electrical measure
39 Playable Words can be made from "COULOMB"
   2-Letter Words (6 found)
   3-Letter Words (14 found)
   4-Letter Words (13 found)
   5-Letter Words (5 found)
   7-Letter Words (1 found)