OPPOSING is a playable word

oppose Scrabble® Dictionary

verb
opposed, opposing, opposes
to be in contention or conflict with
100 Playable Words can be made from "OPPOSING"
   2-Letter Words (13 found)
   3-Letter Words (27 found)
   6-Letter Words (7 found)
   7-Letter Words (3 found)
   8-Letter Words (2 found)