Synonyms of brainless in English:

brainless


See definition of brainless

adjective

1‘they behave as if they are totally brainless’

SYNONYMS
stupid, foolish, witless, unintelligent, ignorant, mindless, idiotic, imbecilic, imbecile, half-witted, simple-minded, silly, empty-headed, half-baked
informal dumb, brain-dead, moronic, cretinous, thick, as thick as two short planks, thickheaded, dopey, dozy, birdbrained, pea-brained, pinheaded, dippy, lamebrained, dunderheaded, wooden-headed
British informal divvy
Scottish, Northern English informal glaikit
North American informal dumb-ass, chowderheaded
South African informal dof
West Indian informal dotish
ANTONYMS

bright, intelligent, clever