Synonyms of maniac

Noun

1. lunatic, madman, maniac, sick person, diseased person, sufferer

usage: an insane person

2. maniac, fancier, enthusiast

usage: a person who has an obsession with or excessive enthusiasm for something

Adjective

1. maniacal, maniac(predicate), insane (vs. sane)

usage: wildly disordered; "a maniacal frenzy"

Definition and meaning of maniac (Dictionary)