Synonyms of 'crackpot'

alien, bedlamite, case, character, crackbrain, crank, cuckoo, dement, demoniac, dingbat, eccentric, energumen, erratic, fanatic, flake, fou, freak, hermit, hobo, idiot, kook, loner, loon, loony, lunatic, madman, maniac, maverick, natural, nonconformist, nut, oddball, oddity, original, outsider, pariah, phrenetic, rara avis, recluse, screwball, solitary, tramp, type, weirdo, zealot