18 possible answers to
Answers with 3 characters: ASS LUG OAF SAP Answers with 4 characters: BOOB BOZO DITZ DOPE SHMO SIMP TWIT Answers with 5 characters: DUNCE IDIOT NINNY SCHMO Answers with 6 characters: DIMWIT Answers with 9 characters: LAMEBRAIN IGNORAMUS