able to think quickly Antonyms

softheaded loopy crackers bonkers barmy around the bend wooden witless vacuous touched thick-headed thick slow-witted slow nuts round the bend schizophrenic unintelligent certifiable screwball crackpot moronic mentally ill wooden-headed thickheaded boneheaded potty dopey empty-headed simple-minded outlandish obtuse dim deranged dense demented delusional daft cretinous crazed clownish chuckleheaded brainsick brainless bovine doltish dozy moonstruck mindless mental