19 entries under impossibility topic. ×

16
inaccessible(adjective, out, expensive, high-priced, pricey)
14
unattainable(adjective, expensive, high-priced, pricey, pricely)
4
impervious
4
out of reach(expression, idiom, unattainable)
4
unfeasible(adjective, impossible)
2
incompatible
2
infeasible
1
desperate
1
hopeless
1
impassable
1
inextricable
1
insuperable
1
insurmountable
0
beyond control(expression, idiom)
0
impracticable unachievable(expression, idiom)
0
innavigable
0
self-contradictory
0
uncomeatable
0
unsurmountable
11 years ago|4.4k views|share |citing 
APASmart Define. (2015). unobtainable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unobtainable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unobtainable thesaurus" https://smartdefine.org/unobtainable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unobtainable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unobtainable/thesaurus/synonyms>.
MLASmart Define. "unobtainable thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/unobtainable/thesaurus/synonyms>