4 entries under irrational topic. ×

4
implausible(adjective, unbelievable, improbable, unreasoned)
2
absurd(adjective, implausible, preposterous, defended)
1
preposterous(absurd, unbelievable, implausible, improbable)
1
unsubstantial(unbelievable, implausible, improbable, unreasoned)
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APASmart Define. (2016). untenable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/untenable/thesaurus/synonyms
ChicagoSmart Define. 2016. "untenable thesaurus" https://smartdefine.org/untenable/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, untenable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/untenable/thesaurus/synonyms>.
MLASmart Define. "untenable thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/untenable/thesaurus/synonyms>