3
illegitimate(adjective, illegality)
3
impermissible
3
not allowed(expression, idiom, offensive, illegal, permitted)
3
out of bounds(expression, adjective, idiom, adverb, offensive)
3
suppressed(verb, adjective)
3
unlicensed(adjective, prohibition)
3
unthinkable(offensive, permitted, prohibition, unmentionable)
2
amputated(verb, adjective, excluded)
2
anathema(adjective, offensive, permitted, unthinkable, unmentionable)
2
banished(verb, adjective, excluded)
2
beyond the pale(expression, idiom, offensive, restricted, permitted)
2
blacklisted(verb, adjective, excluded)
2
constrained(verb, adjective)
2
controlled(verb, adjective)
2
criminal
2
curtailed(verb, adjective)
2
dirty
2
disbarred(verb, adjective, excluded)
2
eliminated(verb, adjective, excluded)
2
eradicated(verb, adjective, excluded)
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APASmart Define. (2015). prohibited thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/prohibited/thesaurus/synonyms
ChicagoSmart Define. 2015. "prohibited thesaurus" https://smartdefine.org/prohibited/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, prohibited thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/prohibited/thesaurus/synonyms>.
MLASmart Define. "prohibited thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/prohibited/thesaurus/synonyms>