COFACTOR is a playable word

cofactor Scrabble® Dictionary

noun
pl. cofactors
a coenzyme
83 Playable Words can be made from "COFACTOR"
   2-Letter Words (7 found)
   5-Letter Words (7 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)