Word Study
ninny
CIDE DICTIONARY
ninny, n. [Cf. It. ninno, ninna, a baby, Sp. niño, niña, child, infant, It. ninna, ninna nanna, lullably, prob. fr. ni, na, as used in singing a child to sleep.].
A fool; a simpleton. Shak. [1913 Webster]
OXFORD DICTIONARY
ninny, n. (pl. -ies) a foolish or simple-minded person.
Etymology
perh. f. innocent
THESAURUS
ninny
Boeotian, ass, block, clod, dimwit, dolt, donkey, dope, dullard, dumb cluck, dumbbell, dummy, dunce, gowk, idiot, imbecile, jackass, jerk, jobbernowl, lackwit, lamebrain, lightweight, looby, loon, niais, nincompoop, ninnyhammer, nitwit, noddy, put, stupid, thickwit, tomfool, witlingROGET THESAURUS
ninny
Fool
N fool, idiot, tomfool, wiseacre, simpleton, witling, dizzard, donkey, ass, ninny, ninnyhammer, chowderhead, chucklehead, dolt, booby, Tom Noddy, looby, hoddy-doddy, noddy, nonny, noodle, nizy, owl, goose, goosecap, imbecile, gaby, radoteur, nincompoop, badaud, zany, trifler, babbler, pretty fellow, natural, niais, child, baby, infant, innocent, milksop, sop, oaf, lout, loon, lown, dullard, doodle, calf, colt, buzzard, block, put, stick, stock, numps, tony, bull head, dunderhead, addlehead, blockhead, dullhead, loggerhead, jolthead, jolterhead, beetlehead, beetlebrain, grosshead, muttonhead, noodlehead, giddyhead, numbskull, thickskull, lackbrain, shallowbrain, dimwit, halfwit, lackwit, dunderpate, lunkhead sawney, gowk, clod, clod-hopper, clod-poll, clot-poll, clot-pate, bull calf, gawk, Gothamite, lummox, rube, men of Boeotia, wise men of Gotham, un sot a triple etage, sot, jobbernowl, changeling, mooncalf, gobemouche, dotard, driveler, old fogey, old woman, crock, crone, grandmother, cotquean, henhussy, incompetent (insanity), greenhorn, dunce, lubber, madman, one who will not set the Thames on fire, one who did not invent gunpowder, qui n'a pas invente' la poudre, no conjuror, fortuna favet fatuis, les fous font les festinas et les sages les mangen, nomina stultorum parietibus harrent, stultorum plena sunt omnia.For further exploring for "ninny" in Webster Dictionary Online