nincompoop
n
fool, ninny, ninnyhammer, silly, goose, silly billy, Sl. yo-yo, tomfool; simpleton, Simple Simon, saphead, noodle, cuckoo, Inf. jay, idiot, imbecile, mooncalf, Inf. moron, Sl. zombie; dimwit, nitwit, half-wit, scatterbrain, Sl. birdbrain, Sl. flake; rattlehead, rattlebrain, rattlepate, harebrain, Sl. dingbat, Sl. ding-a-ling, featherbrain, addle-brain, addle-head, addle-pate, pinhead; dolt, clod, oaf, dunce, Inf. chump, Sl. jerk, Inf. coot, dullard, Inf. numskull; dope, booby, Inf. dummy, Sl. dumbbell, Sl. meatball, Sl. meathead; blockhead, beetlehead, bonehead, dunderhead, dun…