lunatic

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

1. an insane person
• Syn:
madman, maniac
• Derivationally related forms:
maniacal (for: maniac)
• Hypernyms:
sick person, diseased person, sufferer
• Hyponyms:
crazy, loony, looney, nutcase, weirdo,
bedlamite, pyromaniac, madwoman
2. a reckless impetuous irresponsible person
• Syn:
daredevil, madcap, hothead, swashbuckler, harum-scarum
• Derivationally related forms:
harum-scarum (for: harum-scarum), daredevil (for: daredevil)
• Hypernyms:
adventurer, venturer
• Hyponyms:
tearaway

II - adjective

insane and believed to be affected by the phases of the moon (Freq. 1)
• Syn:
moonstruck
• Similar to:
insane
• Derivationally related forms:
lunacy
• Usage Domain:
colloquialism

• Từ đồng nghĩa / Synonyms:
  moonstruck, daredevil, madcap, hothead, swashbuckler, harum-scarum, madman, maniac