Synonyms|213Antonyms|56|Broader|2Narrower|0Related|188

25 entries under implausible topic. ×

5
incredible(adjective, unbelievable, improbable)
4
thin(adjective, weak, deficient, unbelievable)
2
absurd(adjective, irrational, preposterous, defended)
2
impossible(unbelievable, improbable)
2
ridiculous(adjective, absurd, preposterous, improbable)
1
fishy(absurd, unbelievable, preposterous, improbable)
1
flimsy(absurd, unwarranted, untrue, preposterous)
1
inconceivable(absurd, unbelievable, preposterous, improbable)
1
preposterous(absurd, irrational, unbelievable, improbable)
1
questionable(absurd, unbelievable, preposterous, improbable)
1
suspect(absurd, unbelievable, preposterous, improbable)
1
unsubstantial(irrational, unbelievable, improbable, unreasoned)
0
beyond belief(expression, absurd, unbelievable, preposterous)
0
far-fetched(absurd, unbelievable, preposterous, improbable)
0
improbable
0
incogitable(absurd, unbelievable, preposterous, improbable)
0
insupposable(absurd, unbelievable, preposterous, improbable)
0
out of the question(expression, idiom, absurd, preposterous)
0
outlandish(absurd, unbelievable, preposterous, improbable)
0
phony(unbelievable, improbable)
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APASmart Define. (2016). untenable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/untenable/thesaurus/synonyms
ChicagoSmart Define. 2016. "untenable thesaurus" https://smartdefine.org/untenable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, untenable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/untenable/thesaurus/synonyms>.
MLASmart Define. "untenable thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/untenable/thesaurus/synonyms>