19 possible answers to
Answers with 3 characters: ANI MAD Answers with 4 characters: BATS DAFT GAGA LOCO LOON NUTS Answers with 5 characters: BATTY CRAZY LOONY NUTTY NUTSY Answers with 6 characters: INSANE SCREWY Answers with 7 characters: BONKERS NUTCASE Answers with 15 characters: NONCOMPOSMENTIS UTTERLYDEMENTED