Synonyms for Birdbrained:

• adj.

  •bird-brained (adjective)
  • airheaded,
  • empty-headed,
  • featherbrained,
  • flighty,
  • harebrained,
  • scatterbrained,
  • silly.
  •fatuous (adjective)
  • boneheaded,
  • brainless,
  • dense,
  • dull,
  • foolish,
  • idiotic,
  • mindless,
  • puerile,
  • simple,
  • vacuous,
  • witless.
  •flighty (adjective)
  • dizzy,
  • frivolous,
  • gaga,
  • giddy,
  • volatile,
  • bubbleheaded.
  •half-baked (adjective)
  • dumb,
  • ignorant,
  • senseless,
  • slow.
  •idiotic (adjective)
  • fatuous,
  • unintelligent,
  • thick-witted.
  •ignorant (adjective)
  • nescient,
  • obtuse,
  • shallow,
  • thick,
  • uninstructed,
  • unscholarly.
  •lightheaded (adjective)
  • light-headed.
  •nescient (adjective)
  • uninstructed.
  •retarded (adjective)
  • dim,
  • dim-witted,
  • dopey,
  • opaque,
  • slow-witted.
  •senseless (adjective)
  • silly.
  •vacuous (adjective)
  • half-baked,
  • superficial.
  •witless (adjective)
  • doltish,
  • half-witted,
  • witless.

• Other synonyms:

  •
  • featherbrained,
  • gaga.
  •
  • empty-headed,
  • flighty,
  • frivolous,
  • scatterbrained.
  •
  • harebrained.
  •
  • frothy,
  • lighthearted.
  •
  • giddy.
  •
  • dizzy.
  •Other relevant words:
  • ability,
  • airheaded,
  • babyish,
  • bonehead,
  • boneheaded,
  • brain dead,
  • brainless,
  • dense,
  • dim,
  • dim-witted,
  • dizzy,
  • doltish,
  • dopey,
  • dull,
  • dumb,
  • empty-headed,
  • fatuous,
  • featherbrained,
  • flighty,
  • fluffy,
  • foolish,
  • frivolous,
  • frothy,
  • futile,
  • gaga,
  • giddy,
  • goofy,
  • gormless,
  • half-baked,
  • half-witted,
  • harebrained,
  • idiotic,
  • ignorant,
  • light-headed,
  • light-minded,
  • lighthearted,
  • mindless,
  • nescient,
  • oafish,
  • obtuse,
  • opaque,
  • puerile,
  • scatterbrained,
  • senseless,
  • shallow,
  • silly,
  • simple,
  • slow,
  • slow-witted,
  • soft,
  • softheaded,
  • superficial,
  • thick,
  • thickheaded,
  • uninstructed,
  • unintelligent,
  • unscholarly,
  • vacuous,
  • volatile,
  • witless,
  • yeasty,
  • Chuckleheaded,
  • Fiendly,
  • Weak-minded,
  • thick-witted,
  • lamebrain,
  • pinheaded,
  • bubbleheaded,
  • ditzy,
  • dorky,
  • dunderheaded,
  • lunkheaded,
  • unsmart,
  • knuckleheaded,
  • unprofound.

Antonyms for Birdbrained:

• adj.

  • fatuous
    aware, bright, intelligent, keen, sensible, smart.
  • flighty
    responsible, steady.
  • half-baked
    thoughtful, wise.
  • idiotic
    balanced, brainy, careful, cautious, reasonable, sane, serious.
  • ignorant
    competent, educated, experienced, knowledgeable, learned, literate, talented, taught.
  • lightheaded
    gloomy, miserable.
  • retarded
    active, clear, cognizant, light, quick.
  • vacuous
    filled, full.
  • Other antonyms:
    acute, apt, astute, brainy, bright, brilliant, cerebral, clever, crafty, cunning, dignified, discerning, earnest, educated, erudite, fast, foxy, grave, heavy, highbrow, informed, ingenious, insightful, intellectual, intelligent, judicious, keen, knowing, knowledgeable, learned, literate, logical, melancholy, nimble, no-nonsense, perceptive, percipient, perspicacious, prudent, quick, quick-witted, rational, reasonable, resourceful, sagacious, sage, sane, sapient, savvy, scholarly, schooled, sedate, sensible, serious, severe, sharp, shrewd, skilled, smart, sober, solemn, somber, sound, staid, thinking, thoughtful, trained, valid, well-read, wily, wise, Sharp-witted, hyperintelligent, supersmart, ultrasmart.