Synonyms for Hare-brained:

• adj.

  •Other relevant words: (adjective)
  • wacky.
  •wacky (adjective)
  • loony,
  • deranged,
  • nuts,
  • odd,
  • crazy,
  • erratic,
  • foolish,
  • crazed,
  • balmy,
  • nutty,
  • lunatic,
  • demented,
  • eccentric,
  • insane,
  • daft,
  • wild,
  • screwy,
  • hare-brained,
  • mad,
  • silly,
  • unpredictable,
  • irrational,
  • preposterous.
  •zany (adjective)
  • humorous,
  • comical,
  • zany,
  • kooky,
  • fool,
  • campy,
  • fooler,
  • dumb,
  • madcap,
  • goofy,
  • clownish,
  • campier,
  • campiest,
  • joshing,
  • witty.

• n.

  •Other relevant words: (noun)
  • reckless,
  • rash,
  • heedless,
  • giddy,
  • careless.

• Other synonyms:

  •Other relevant words (noun):
  • absurd.

Antonyms for Hare-brained:

• adj.

  • wacky
    calm, collected.
  • zany
    serious.