Synonyms|1.1kAntonyms|559|Broader|13Narrower|0Related|1.3k
1
obsequious
1
oily
1
oleaginous
1
plausible
1
pseudo
1
shifty
1
simulated
1
slick
1
slippery
1
smarmy
1
soapy
1
sophisticated
1
specious
1
spurious
1
strained
1
sycophantic
1
toadyish
1
underhanded
1
unnatural
1
unreal(adjective, false, insincere)
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APASmart Define. (2016). sincere thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/sincere/thesaurus/antonyms
ChicagoSmart Define. 2016. "sincere thesaurus" https://smartdefine.org/sincere/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, sincere thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/sincere/thesaurus/antonyms>.
MLASmart Define. "sincere thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/sincere/thesaurus/antonyms>