brainless

• POS: Adjective
• HYPHEN: brain=less

CIDE DICTIONARY

brainless, a. 

 Without understanding; silly; thoughtless; witless.  [1913 Webster]

OXFORD DICTIONARY

brainless, adj. stupid, foolish.

THESAURUS

brainless

apish, asinine, batty, befooled, beguiled, besotted, buffoonish, cockeyed, crazy, credulous, daffy, daft, dazed, dizzy, doting, dumb, empty-headed, fatuitous, fatuous, featherbrained, featherheaded, flaky, fluttery, fond, fool, foolheaded, foolish, frivolous, fuddled, futile, gaga, giddy, giddy-brained, giddy-headed, giddy-pated, giddy-witted, goofy, gulled, harebrain, harebrained, headless, idiotic, ignorant, imbecile, inane, inept, infatuated, insane, insensate, irrational, kooky, lackbrained, lean-minded, lean-witted, loony, mad, maudlin, mindless, moronic, nitwitted, not bright, nutty, of little brain, pea-brained, pin-brained, rattlebrained, rattleheaded, rattlepated, reasonless, sappy, scatterbrained, scramblebrained, screwy, senseless, sentimental, shatterbrained, silly, slackminded, slackwitted, stupid, thoughtless, ungifted, unintellectual, unintelligent, unreasoning, untalented, unthinking, unwise, unwitty, wacky, weak-minded, wet, witless

ROGET THESAURUS

brainless

Absence or want of Intellect

N absence of Intellect, want of intellect, imbecility brutality, brute force, instinct, brute instinct, stimulus-response loop, conditioned response, instinctive reaction, Pavlovian response, mimicry, aping (imitation), moron, imbecile, idiot, fool, dumb animal, vegetable, brain dead, Adj, unendowed with reason, void of reason, thoughtless, vegetative, moronic, idiotic, brainless, Adv, instinctively, like Pavlov's dog, vegetatively, unendowed with reason, void of reason, thoughtless, vegetative, moronic, idiotic, brainless, instinctively, like Pavlov's dog, vegetatively, V, mimic, ape (imitate), respond instinctively, absence of Intellect, want of intellect, imbecility brutality, brute force, instinct, brute instinct, stimulus-response loop, conditioned response, instinctive reaction, Pavlovian response, mimicry, aping (imitation), moron, imbecile, idiot, fool, dumb animal, vegetable, brain dead, Adj, unendowed with reason, void of reason, thoughtless, vegetative, moronic, idiotic, brainless, Adv, instinctively, like Pavlov's dog, vegetatively, unendowed with reason, void of reason, thoughtless, vegetative, moronic, idiotic, brainless, instinctively, like Pavlov's dog, vegetatively, V, mimic, ape (imitate), respond instinctively.

Folly

N imbecility folly, want of intelligence &c, want of intellect, shadowness, silliness, foolishness, imbecility, incapacity, vacancy of mind, poverty of intellect, weakness of intellect, clouded perception, poor head, apartments to let, stupidity, stolidity, hebetude, dull understanding, meanest capacity, shortsightedness, incompetence, one's weak side, not one's strong point, bias, infatuation, simplicity, puerility, babyhood, dotage, anility, second childishness, fatuity, idiocy, idiotism, driveling, folly, frivolity, irrationality, trifling, ineptitude, nugacity, inconsistency, lip wisdom, conceit, sophistry, giddiness, eccentricity, extravagance, rashness, act of folly, unintelligent, unintellectual, unreasoning, mindless, witless, reasoningless, brainless, halfbaked, having no head, not bright, inapprehensible, weak headed, addle headed, puzzle headed, blunder headed, muddle headed, muddy headed, pig headed, beetle headed, buffle headed, chuckle headed, mutton headed, maggoty headed, grossheaded, beef headed, fat witted, fat-headed, weak-minded, feeble-minded, dull minded, shallow minded, lack- brained, rattle-brained, rattle headed, half witted, lean witted, short witted, dull witted, blunt-witted, shallow-pated, clod-pated, addle- pated, addle-brained, dim-sighted, short-sighted, thick-skulled, weak in the upper story, shallow, borne, weak, wanting, soft, sappy, spoony, dull, dull as a beetle, stupid, heavy, insulse, obtuse, blunt, stolid, doltish, asinine, inapt, prosaic, hebetudinous, childish, child-like, infantine, infantile, babyish, babish, puerile, anile, simple, old-womanish, fatuous, idiotic, imbecile, driveling, blatant, babbling, vacant, sottish, bewildered, blockish, unteachable Boeotian, Boeotic, bovine, ungifted, undiscerning, unenlightened, unwise, unphilosophical, apish, simious, foolish, silly, senseless, irrational, insensate, nonsensical, inept, maudlin, narrow-minded, bigoted, giddy, rash, eccentric, foolish, unwise, injudicious, improper, unreasonable, without reason, ridiculous, absurd, idiotic, silly, stupid, asinine, ill-imagined, ill-advised, ill-judged, ill-devised, mal entendu, inconsistent, irrational, unphilosophical, extravagant, sleeveless, idle, pointless, useless, inexpedient, frivolous, Davus sum non, a fool's bolt is soon shot clitellae bovi sunt im, fools rush in where angels fear to tread, il n' a ni bouche ni eperon, the bookful blockhead, ignorantly read, to varnish nonsense with the charms of sound.