Ninnies, noun plural of ninny. Synonyms in the same form.
Nincompoop
nincompoops, fools, dunces, dullards, idiots, dolts, imbeciles, nitwits, twits, stupids, dimwits, simpletons, sillies, jerks, clods, dummies, puts, poops, halfwits, tomfools, ninnyhammers, dummkopfs
Dumb cluck
dumb-bells
Block head
pin-heads
Other
jack-asses, wee-wees, lack-wits, jackaninnies
All synonyms for ninny →