Synonyms of lunatic

Noun

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

usage: an insane person

2. daredevil, madcap, hothead, swashbuckler, lunatic, harum-scarum, adventurer, venturer

usage: a reckless impetuous irresponsible person

Adjective

1. lunatic, moonstruck, insane (vs. sane)

usage: insane and believed to be affected by the phases of the moon

Definition and meaning of lunatic (Dictionary)