6
reprobate(adjective, dishonest, immoral, rotten, untrustworthy)
6
shameful(adjective, nasty, cruel, unkind, uncaring)
6
slick
6
treacherous(adjective, hard, evil, rough, nasty)
6
tricky
6
unethical(adjective, dishonest, immoral, rotten, untrustworthy)
6
unprincipled(adjective, wicked, dishonest, immoral, rotten)
6
wicked(adjective, improbity)
5
criminal
5
crooked(adjective, wicked, dishonest, immoral, rotten)
5
cute
5
iniquitous(adjective, wicked, dishonest, immoral, rotten)
5
low
5
perfidious(adjective, hard, evil, rough, nasty)
5
unconscionable(adjective, dishonest, immoral, immoderate)
5
vile(adjective, hard, evil, rough, nasty)
5
wily
4
abominable
4
base(adjective, wicked, dishonest, immoral, rotten)
4
lying
11 years ago|14k views|share |citing 
APASmart Define. (2015). knavish thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/knavish/thesaurus/synonyms
ChicagoSmart Define. 2015. "knavish thesaurus" https://smartdefine.org/knavish/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, knavish thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/knavish/thesaurus/synonyms>.
MLASmart Define. "knavish thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/knavish/thesaurus/synonyms>