11
roguish(adjective, deceitful)
10
scoundrelly(adjective, mean, bad, evil, base)
9
mischievous(adjective, wicked, devilish, ill-behaved, imposturous)
7
devilish
6
blackguardly(adjective, adverb)
6
villainous(adjective, mean, bad, evil, base)
5
base(adjective, mean, bad, evil, rude)
5
impish(adjective, mischievous)
5
knavish(adjective, dishonest)
5
mean(adjective, bad, evil, base, wicked)
5
wicked(adjective, mean, bad, base, malicious)
4
miscreant(adjective, evil, immoral)
4
scampish
4
vile
3
abject(adjective, improbity)
3
contemptible(adjective, improbity)
3
corrupt(adjective, mean, bad, evil, base)
3
diabolical
3
dirty(adjective, improbity)
3
naughty(adjective, bad, misbehaved)
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APASmart Define. (2015). rascally thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/rascally/thesaurus/synonyms
ChicagoSmart Define. 2015. "rascally thesaurus" https://smartdefine.org/rascally/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, rascally thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/rascally/thesaurus/synonyms>.
MLASmart Define. "rascally thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/rascally/thesaurus/synonyms>