72 entries under noun topic. ×

6
impracticality(awkwardness, hopelessness, uselessness, inefficiency)
5
impossibleness
5
impracticability(difficulty, awkwardness, hopelessness, uselessness)
5
unlikelihood(hopelessness, improbability, impracticality, implausibility)
4
absurdity
4
difficulty(difficulty, hopelessness, impracticality, unfeasibility)
4
futility(hopelessness, impracticality, unfeasibility)
4
failure(hopelessness, impracticality, unfeasibility)
4
hopelessness(awkwardness, uselessness, impracticality, unfeasibility)
4
implausibility
4
impossible action(expression, idiom)
4
paradox
3
contrariety(hopelessness, impracticality, unfeasibility)
3
self-contradiction
3
unattainability(hopelessness, impracticality, unfeasibility)
3
unreasonableness(hopelessness, improbability, impracticality, unlikelihood)
3
unsatisfiability
3
unworkability(awkwardness, hopelessness, uselessness, impracticality)
2
contradiction
2
improbability
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APASmart Define. (2015). impossibility thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impossibility/thesaurus/synonyms
ChicagoSmart Define. 2015. "impossibility thesaurus" https://smartdefine.org/impossibility/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, impossibility thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impossibility/thesaurus/synonyms>.
MLASmart Define. "impossibility thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/impossibility/thesaurus/synonyms>