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WORDNET DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Adjective bonkers has 1 sense

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

OXFORD DICTIONARY

THESAURUS

bonkers

balmy, bananas, barmy, bats, batty, beany, bedlamite, brainsick, buggy, bughouse, bugs, crackbrained, crackers, cuckoo, daffy, dippy, dotty, flaky, flipped, freaked-out, fruitcakey, fruity, gaga, goofy, haywire, just plain nuts, kooky, loony, loopy, nuts, nutty, off the hinges, off the track, off the wall, potty, round the bend, screwball, screwballs, screwy, slaphappy, wacky

For further exploring for "bonkers" in Webster Dictionary Online