lunatic
[adjective]
Synonyms:
- irrational, crackbrained, crackpot (informal), crazy, daft, deranged, insane, mad
[noun]
Synonyms:
- madman, maniac, nutcase (slang), psychopath

---

Related Words: demoniac, energumen, raver, neuropath, neurotic, paranoid, psycho, psychoneurotic

[TahlilGaran] English Synonym Dictionary ▲

lu‧na‧tic /ˈluːnətɪk/ noun [countable]
[Date: 1200-1300; Language: Old French; Origin: lunatique, from Late Latin lunaticus, from Latin luna ( ⇒ lunar); because people thought mental illness was caused by the moon]

1. someone who behaves in a crazy or very stupid way – often used humorously:
This hotel is run by a lunatic!

2. old-fashioned a very offensive word for someone who is mentally ill:
a dangerous lunatic

3. the lunatic fringe British English the small group of people in a political group or organization who have the most extreme opinions or ideas
—lunatic adjective [only before noun]:
lunatic behaviour

[TahlilGaran] Dictionary of Contemporary English ▲

lunatic
noun
ADJ. complete, raving | dangerous | criminal
LUNATIC + NOUN asylum

[TahlilGaran] Collocations Dictionary ▲