2
labyrinth
2
out of the question(expression, idiom, wild, unreasonable, useless)
1
impossibility
1
unachievable
1
unworkable(adjective, impossible, impracticable)
0
forbidden
0
hopeless case(noun, impossibility)
0
illegal
0
illegitimate
0
illicit
0
impossible
0
irresoluble
0
irresolvable
0
no-no(noun, impossibility)
0
nonstarter(noun, impossibility)
0
off-limits
0
possibly
0
taboo
0
unattainable(adjective, impossible)
0
unauthorized
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APASmart Define. (2013). no-go thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/no-go/thesaurus/synonyms
ChicagoSmart Define. 2013. "no-go thesaurus" https://smartdefine.org/no-go/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, no-go thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/no-go/thesaurus/synonyms>.
MLASmart Define. "no-go thesaurus" 28 June 2013. Web. 20 September 2026. <https://smartdefine.org/no-go/thesaurus/synonyms>