13
sinful(adjective, good, bad, immoral, criminal)
11
shameful
10
slut
10
whore
10
horizontal(adjective, flat, rough, level, vertical)
9
dishonest(adjective, good, open, honest, level)
9
hypocritical(adjective, deceitful, pretending)
7
outrageous
6
lying(verb, adjective, level)
6
ambidextrous
6
shy
5
pigeon-toed
5
prone(adjective, level, down, disinclined)
5
unerect
4
bad(adjective, quality, immoral)
4
dishonorable(adjective, level)
4
black
3
bad to the bone
3
dirty(adjective, clear, bright, obscene, pornographic)
3
disreputable(adjective, level)
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APASmart Define. (2015). upright thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/upright/thesaurus/antonyms
ChicagoSmart Define. 2015. "upright thesaurus" https://smartdefine.org/upright/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, upright thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/upright/thesaurus/antonyms>.
MLASmart Define. "upright thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/upright/thesaurus/antonyms>