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"

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See also: maniac (Dictionary)