16 entries under adjective topic. ×

6
unattainable(impractical, impracticable, unrealizable)
6
undoable(impractical, impracticable, unrealizable)
5
unfeasible(impractical, impracticable, unrealizable)
5
unworkable(impractical, impracticable, unrealizable)
4
impracticable
4
infeasible(impractical, impracticable, unrealizable)
4
unachievable
4
unrealizable
3
hopeless
3
out
3
unpractical(impractical, impracticable, unrealizable)
2
intolerable
1
unbearable
0
conundrum
0
unendurable
0
unthinkable
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APASmart Define. (2016). impossible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impossible/thesaurus/related
ChicagoSmart Define. 2016. "impossible thesaurus" https://smartdefine.org/impossible/thesaurus/related (accessed September 23, 2026).
HarvardSmart Define 2016, impossible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impossible/thesaurus/related>.
MLASmart Define. "impossible thesaurus" 9 March 2016. Web. 23 September 2026. <https://smartdefine.org/impossible/thesaurus/related>