Synonyms of mischievous

1 Syllable

bad, ill, arch, slyer, slyest, rude, sliest, sly, slier

2 Syllables

harmful, coltish, larkish, nocuous, puckish, vexing, teasing, errant, playful, elvish, rowdier, sinful, evil, tricky, impish, sporting, foxy, wayward, sneaking, nocent, naughtiest, wicked, naughtier, hurtful, vicious, risky, rowdy, rascal, jokey, artful, naughty, dickens

3 Syllables

injurious, malicious, damaging, irksome, rascally, spiteful, insidious, kibitzing, perilous, hazardous, blackhearted, noisome, vexatious, precarious, malignant, pernicious, errable, sportive, fun-loving, dangerous, whimsical, sinister, jocular, kittenish

4 Syllables

frolicsome, ill-behaved, bothersome, deleterious, misbehaving, troublesome, obstructive, destructive, detrimental, intermeddling, prejudicious, meddlesome, prejudicial

5 Syllables

unconducive, sportspersonlike, exasperating, insalutary, undisciplined

6 Syllables

counterproductive