15 entries under permitted topic. ×

17
illegal(adjective, offensive, illegitimate, unlawful)
15
taboo(adjective, allowed, outlawed)
4
off limits(expression, adjective, idiom, offensive)
4
restricted(verb, adjective, offensive, prohibited)
3
disapproved(verb, adjective, offensive, prohibited)
3
out of bounds(expression, adjective, idiom, offensive, restricted)
2
ruled out(expression, offensive, prohibited, unthinkable)
2
unacceptable(adjective, offensive, prohibited, unthinkable)
2
unmentionable(adjective, offensive, prohibited, unthinkable)
1
anathema(adjective, offensive, prohibited, unthinkable)
0
not allowed(expression, adjective, idiom, adverb, offensive)
0
beyond the pale(expression, idiom, offensive, restricted)
0
frowned on(expression, offensive, prohibited, unthinkable)
0
reserved(offensive, prohibited, unthinkable, unmentionable)
0
unthinkable(offensive, prohibited, unmentionable)
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APASmart Define. (2015). banned thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/banned/thesaurus/synonyms
ChicagoSmart Define. 2015. "banned thesaurus" https://smartdefine.org/banned/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, banned thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/banned/thesaurus/synonyms>.
MLASmart Define. "banned thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/banned/thesaurus/synonyms>