10
outrageous(adjective, usual, shocking, shameful, disgraceful)
7
forbidden(adjective, offensive, restricted, illegal, permitted)
5
taboo(adjective, bar, offensive, ban, refusal)
4
off limits(noun, expression, adjective, adverb, refusal)
4
unreasonable(adjective, reason, usual, shocking, shameful)
3
banned(adjective, offensive, restricted, permitted, prohibited)
3
controlled
3
illegal(adjective, offensive, permitted, unjustified, prohibited)
3
outlawed(adjective, offensive, permitted, prohibited, unthinkable)
3
preposterous(adjective, usual, shocking, shameful, disgraceful)
3
prohibited(adjective, offensive, restricted, permitted, unthinkable)
3
restricted(adjective, offensive, permitted, prohibited, unthinkable)
3
unconscionable(adjective, usual, extreme, improper, shocking)
3
unlawful(adjective, adverb, unreasonable, extreme, improper)
2
egregious(shocking, shameful, disgraceful)
2
excessive(extreme, improper, shocking, senseless, radical)
2
exorbitant(extreme, improper, shocking, senseless, excessive)
2
extortionate(extreme, improper, shocking, senseless, excessive)
2
extravagant(shocking, shameful, excessive, disgraceful, immoderate)
2
extreme(improper, shocking, senseless, absolute, radical)
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APASmart Define. (2015). out of bounds thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/out_of_bounds/thesaurus/synonyms
ChicagoSmart Define. 2015. "out of bounds thesaurus" https://smartdefine.org/out_of_bounds/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, out of bounds thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/out_of_bounds/thesaurus/synonyms>.
MLASmart Define. "out of bounds thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/out_of_bounds/thesaurus/synonyms>