Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun maniac

2 senses of maniac

Sense 1
lunatic, madman, maniac -- (an insane person)
       => sick person, diseased person, sufferer -- (a person suffering from an illness)

Sense 2
maniac -- (a person who has an obsession with or excessive enthusiasm for something)
       => fancier, enthusiast -- (a person having a strong liking for something)

Antonyms of adj maniac

1 sense of maniac

Sense 1
maniacal, maniac (predicate) -- (wildly disordered; "a maniacal frenzy")

INDIRECT (VIA insane) -> sane -- (mentally healthy; free from mental disorder; "appears to be completely sane")

Similarity of adj maniac

1 sense of maniac

Sense 1
maniacal, maniac (predicate) -- (wildly disordered; "a maniacal frenzy")
       => insane (vs. sane) -- (afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter")