COMBOS is a playable word

combo Scrabble® Dictionary

noun
pl. combos
a small jazz band
34 Playable Words can be made from "COMBOS"
   2-Letter Words (5 found)
   3-Letter Words (13 found)
   4-Letter Words (8 found)
   5-Letter Words (6 found)
   6-Letter Words (2 found)