Word Study
kooky
OXFORD DICTIONARY
kooky, adj. (kookier, kookiest) sl. crazy.
Derivative
kookily adv. kookiness n.
THESAURUS
kooky
abnormal, absurd, anomalous, apish, asinine, balmy, bananas, barmy, bats, batty, beany, befooled, beguiled, besotted, bonkers, brainless, buffoonish, buggy, bughouse, bugs, cockeyed, crackers, crank, crankish, cranky, crazy, credulous, crotchety, cuckoo, curious, daffy, daft, dazed, deviant, deviative, different, dippy, divergent, dizzy, doting, dotty, dumb, eccentric, erratic, exceptional, fatuitous, fatuous, fey, flaky, flipped, fond, fool, foolheaded, foolish, freaked out, freaked-out, freakish, freaky, fruitcakey, fruity, fuddled, funny, futile, gaga, goofy, gulled, haywire, idiocratic, idiosyncratic, idiotic, imbecile, inane, inept, infatuated, insane, irregular, just plain nuts, kinky, loony, loopy, mad, maggoty, maudlin, moronic, nuts, nutty, odd, oddball, off, off the hinges, off the track, off the wall, out, outlandish, passing strange, peculiar, potty, quaint, queer, quirky, round the bend, sappy, screwball, screwballs, screwy, senseless, sentimental, silly, singular, slaphappy, strange, stupid, thoughtless, twisted, unconventional, unearthly, unnatural, wacky, weird, wet, whimsical, witless, wondrous strangeFor further exploring for "kooky" in Webster Dictionary Online