2
high(adjective, expensive, high-priced, pricey, pricely)
2
impassable(adjective, inaccessible, impossible, impossibility)
2
implausible(adjective, impossible)
2
improbable(adjective, wild, unreasonable, useless, absurd)
2
incompatible
2
inoperable(wild, unreasonable, useless, absurd, unrealistic)
2
preposterous(adjective, impossible)
2
quixotic(adjective, wild, unreasonable, useless, intellectual)
2
romantic(wild, unreasonable, useless, absurd, unrealistic)
2
un-come-at-able
2
unaccessible
2
ungettable(adjective, inaccessible)
2
unnegotiable(adjective, impracticable)
2
unusable(adjective, wild, unreasonable, useless, absurd)
1
unrealistic(adjective, wild, unreasonable, useless, absurd)
1
absent(adjective, unobtainable)
1
absentee
1
abstract(adjective, wild, unreasonable, useless, intellectual)
1
astronomical(adjective, expensive, high-priced, pricey, pricely)
1
chimerical(adjective, wild, unreasonable, useless, intellectual)
11 years ago|5.4k views|share |citing 
APASmart Define. (2015). unattainable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unattainable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unattainable thesaurus" https://smartdefine.org/unattainable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unattainable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unattainable/thesaurus/synonyms>.
MLASmart Define. "unattainable thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unattainable/thesaurus/synonyms>