Synonyms for Birdbrained:

• adj.

  •bird-brained (adjective)
  • rattlebrained,
  • scatty,
  • rattlepated,
  • Addle-brained,
  • Addle-pated,
  • Addle-headed.
  •fatuous (adjective)
  • dull,
  • idiotic,
  • asinine,
  • absurd,
  • puerile,
  • sappy,
  • dense,
  • witless,
  • jerky,
  • brainless,
  • mad,
  • lunatic,
  • moronic,
  • mindless,
  • foolish,
  • imbecile,
  • simple,
  • ludicrous,
  • inane,
  • insensate.
  •flighty (adjective)
  • impulsive,
  • mercurial,
  • volatile,
  • unsteady,
  • inconstant,
  • lightheaded,
  • impetuous,
  • thoughtless,
  • changeable,
  • whimsical,
  • dingbat,
  • effervescent,
  • twit,
  • lively,
  • capricious,
  • unstable,
  • unbalanced,
  • wild.
  •half-baked (adjective)
  • crazy,
  • blockheaded,
  • senseless,
  • backward,
  • Sophomoric,
  • slow,
  • dumb,
  • underdeveloped,
  • indiscreet,
  • impractical,
  • short-sighted,
  • batty,
  • imbecilic,
  • retarded,
  • Feeble-minded,
  • unformed.
  •idiotic (adjective)
  • daft,
  • insane,
  • foolhardy,
  • unintelligent,
  • thick-witted,
  • Daffy.
  •ignorant (adjective)
  • nescient,
  • uneducated,
  • insensible,
  • apprenticed,
  • unsuspecting,
  • shallow,
  • thick,
  • naive,
  • untaught,
  • obtuse,
  • misinformed,
  • uncultivated,
  • green,
  • oblivious,
  • shallower,
  • unwitting,
  • unschooled,
  • unenlightened,
  • uninitiated,
  • benighted,
  • unread,
  • untrained,
  • blind to,
  • uninformed,
  • in the dark,
  • unscholarly,
  • unintellectual,
  • Unconversant,
  • innocent,
  • unlettered,
  • cretinous,
  • uncultured,
  • illiterate,
  • unmindful,
  • unconscious,
  • inexperienced,
  • uninstructed,
  • unlearned,
  • unknowledgeable.
  •lightheaded (adjective)
  • hazy,
  • fickle,
  • delirious,
  • vertiginous,
  • Punchy,
  • light-headed,
  • rocky,
  • bird-brained,
  • Reeling,
  • trifling,
  • flippant,
  • swimmy,
  • tired,
  • woozy,
  • whirling,
  • swimming,
  • faint.
  •retarded (adjective)
  • subnormal,
  • dumbbell,
  • DUMBO,
  • touched,
  • pinhead,
  • exceptional,
  • simple-minded,
  • dummy,
  • weak,
  • held back,
  • defective.
  •scatterbrained (adjective)
  • irresponsible,
  • stupid,
  • slaphappy,
  • careless,
  • forgetful,
  • illogical,
  • irrational,
  • madcap,
  • inattentive.
  •uninstructed (adjective)
  • un instructed,
  • un-instructed.
  •unscholarly (adjective)
  • unstudious.
  •vacuous (adjective)
  • drained,
  • emptied,
  • void,
  • uncomprehending,
  • blank,
  • minus,
  • vacant.
  •witless (adjective)
  • ridiculous,
  • kooky,
  • feebleminded,
  • unwise,
  • cockamamy,
  • dotty,
  • ill-advised,
  • halfwitted,
  • nonsensical,
  • wacky,
  • zany,
  • nutty,
  • loony.

• n.

  •
  • silly.

• Other synonyms:

  •
  • featherbrained,
  • gaga.
  •
  • flighty,
  • frivolous,
  • empty-headed.
  •
  • harebrained.
  •
  • frothy,
  • lighthearted.
  •
  • giddy.
  •
  • dizzy.
  •Other relevant words:
  • dopey,
  • brain dead,
  • fluffy,
  • dunderheaded,
  • dim,
  • babyish,
  • opaque,
  • bonehead,
  • softheaded,
  • light-minded,
  • oafish,
  • ditzy,
  • unprofound,
  • Chuckleheaded,
  • dim-witted,
  • doltish,
  • gormless,
  • Weak-minded,
  • superficial,
  • half-witted,
  • lamebrain,
  • ability,
  • unsmart,
  • soft,
  • yeasty,
  • goofy,
  • lunkheaded,
  • slow-witted,
  • futile,
  • thickheaded,
  • Fiendly.

Antonyms for Birdbrained:

• adj.

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