4
prohibited(adjective, adverb, offensive, illegal, permitted)
4
forbidden(adjective, adverb, offensive, permitted, prohibited)
3
gossamery
2
off-limits(adjective, adverb, prohibited, not)
2
at an end(expression, adjective, dead, away, outside)
2
banned(adjective, adverb, offensive, permitted, prohibited)
2
not on(expression, adjective, dead, away, outside)
2
out of bounds(expression, adjective, idiom, adverb, offensive)
2
outlawed(adjective, adverb, offensive, illegal, permitted)
2
proscribed(adjective, offensive, permitted, prohibited, unthinkable)
2
restricted(adjective, adverb, offensive, permitted, prohibited)
1
actionable
1
beyond the pale(expression, adjective, idiom, offensive, permitted)
1
contraband
1
not permitted(expression, off-limits)
1
off limits(expression, adjective, adverb, offensive, permitted)
1
old-hat(adjective, dead, departed)
1
ruled out(expression, adjective, offensive, away, permitted)
1
stop
1
taboo
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APASmart Define. (2015). not allowed thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/not_allowed/thesaurus/synonyms
ChicagoSmart Define. 2015. "not allowed thesaurus" https://smartdefine.org/not_allowed/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, not allowed thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/not_allowed/thesaurus/synonyms>.
MLASmart Define. "not allowed thesaurus" 11 October 2015. Web. 20 September 2026. <https://smartdefine.org/not_allowed/thesaurus/synonyms>