- lunatic, moonstruck - insane and believed to be affected by the phases of the moon
Antonym: sane (indirect, via insane)
- lunatic, madman, maniac - an insane person
--1 is a kind of sick person, diseased person, sufferer
--1 has particulars:crazy, loony, looney, weirdo; bedlamite; pyromaniac; madwoman - daredevil, madcap, hothead, swashbuckler, lunatic, harum-scarum - a reckless impetuous irresponsible person
--2 is a kind of adventurer, venturer
--2 has particulars: tearaway