OPPUGN is a playable word

oppugn Scrabble® Dictionary

verb
oppugned, oppugning, oppugns
to assail with argument
22 Playable Words can be made from "OPPUGN"
   2-Letter Words (8 found)
   3-Letter Words (9 found)
   4-Letter Words (3 found)
   6-Letter Words (2 found)