56 entries under adjective topic. ×

16
impracticable(wild, unreasonable, useless, absurd)
15
unworkable(unreasonable, useless, absurd, impractical)
12
infeasible(wild, unreasonable, useless, absurd)
12
unattainable(unreasonable, useless, absurd, impractical)
11
impossible(perfect, wild, unreasonable, useless)
9
impractical(perfect, wild, unreasonable, useless)
6
unachievable(unreasonable, useless, absurd, impractical)
5
inoperable(wild, unreasonable, useless, absurd)
4
inaccessible(out, impossibility)
4
unrealizable(unreasonable, impossible, out-of-the-way, unapproachable)
3
absurd(wild, unreasonable, useless, preposterous)
3
unobtainable(impossible, impossibility)
3
unusable(wild, unreasonable, useless, absurd)
2
hopeless
2
implausible
2
improbable(wild, unreasonable, useless, absurd)
2
inconceivable
2
out of the question(expression, wild, unreasonable, useless)
2
unbelievable
2
unnegotiable
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APASmart Define. (2015). unfeasible thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unfeasible/thesaurus/synonyms
ChicagoSmart Define. 2015. "unfeasible thesaurus" https://smartdefine.org/unfeasible/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unfeasible thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unfeasible/thesaurus/synonyms>.
MLASmart Define. "unfeasible thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/unfeasible/thesaurus/synonyms>