39 entries under impossible topic. ×

13
impracticable(adjective, unreasonable, possible, out-of-the-way)
13
impractical(adjective, unreasonable, possible, unpractical)
13
unattainable(adjective, unreasonable, possible, inaccessible)
13
unworkable(adjective, unreasonable, possible, inaccessible)
10
unachievable
6
infeasible(adjective, unreasonable, inaccessible, unreachable)
5
unfeasible(adjective, unreasonable, out-of-the-way, unapproachable)
4
absurd(adjective, unreasonable, unpractical, unfeasible)
4
hopeless
4
inaccessible(adjective, out)
4
visionary(adjective, unreasonable, unpractical, unfeasible)
3
inconceivable
3
insurmountable
3
preposterous
3
unreasonable(adjective, unpractical, unfeasible, unviable)
3
unthinkable(adjective, possible)
3
useless(adjective, unreasonable, unpractical, unfeasible)
2
futile
2
unimaginable
2
unobtainable
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APASmart Define. (2015). unrealizable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/unrealizable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrealizable thesaurus" https://smartdefine.org/unrealizable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, unrealizable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/unrealizable/thesaurus/synonyms>.
MLASmart Define. "unrealizable thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/unrealizable/thesaurus/synonyms>