1
sophistical(adjective, wrong, fake, counterfeit, dishonest)
1
thievish
1
traitorous(adjective, wrong, false, dishonest, deceitful)
1
trumped up(expression, adjective, wrong, fake, counterfeit)
1
uncandid
1
unconverted(adjective, false, dishonest, dubious, fickle)
1
unfaithful(noun, adjective, wrong, false, dishonest)
1
unfrank
1
unloyal(adjective, wrong, false, dishonest, dubious)
1
unproven(adjective, false, untrue, illogical, deceptive)
1
unsincere
1
unveracious
1
vain(adjective, false, untrue, illogical, deceptive)
1
without basis(expression, adjective, false, untrue, illogical)
1
without foundation(expression, adjective, false, untrue, illogical)
0
adulterated(adjective, fake, counterfeit, sham, phony)
0
adulterine(fickle, untrustworthy, unprincipled, dirty-dealing)
0
adulterous(fickle, untrustworthy, unprincipled, dirty-dealing)
0
afield
0
alloyed(adjective, fake, counterfeit, sham, phony)
11 years ago|14k views|share |citing 
APASmart Define. (2015). untruthful thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/untruthful/thesaurus/synonyms
ChicagoSmart Define. 2015. "untruthful thesaurus" https://smartdefine.org/untruthful/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, untruthful thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/untruthful/thesaurus/synonyms>.
MLASmart Define. "untruthful thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/untruthful/thesaurus/synonyms>