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HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Adjective nutty has 2 senses

• nutty(s = adj.all) nutlike - having the flavor of nuts; "a nutty sherry"
Derived form noun nut₁

• nutty(s = adj.all) around the bend, balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, daft, dotty, fruity, haywire, kookie, kooky, loco, loony, loopy, nuts, round the bend, wacky, whacky - informal or slang terms for mentally irregular; "it used to drive my husband balmy"

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

nutty

abnormal, anomalous, apish, asinine, balmy, bananas, barmy, bats, batty, beany, bedlamite, befooled, beguiled, besotted, bonkers, brainless, buffoonish, buggy, bughouse, bugs, cockeyed, cracked, crackers, crank, crankish, cranky, crazed, crazy, credulous, crotchety, cuckoo, daffy, daft, dazed, deviant, deviative, different, dippy, divergent, dizzy, doting, dotty, dumb, eccentric, erratic, exceptional, fatuitous, fatuous, fey, flaky, flavorful, flavorous, flavorsome, flavory, flipped, fond, fool, foolheaded, foolish, freaked-out, freakish, fruitcakey, fruity, fuddled, full-bodied, full-flavored, funny, futile, gaga, goofy, gulled, gung ho, haywire, idiocratic, idiosyncratic, idiotic, imbecile, inane, inept, infatuated, insane, irregular, just plain nuts, keen, kinky, kooky, loony, loopy, mad, maggoty, maudlin, moronic, nuts, odd, oddball, off the hinges, off the track, off the wall, peculiar, potty, queer, quirky, rich, rich-flavored, round the bend, sappy, screwball, screwballs, screwy, senseless, sentimental, silly, singular, slaphappy, strange, stupid, thoughtless, twisted, unconventional, unnatural, wacky, warm, wet, whimsical, witless, zealous

For further exploring for "nutty" in Webster Dictionary Online