120 entries under adjective topic. ×

15
forbidden(verb, allow, informal, irregular)
14
prohibited(offensive, irregular, unwarranted, criminal)
13
banned(permitted, allowed, forbidden, outlawed)
11
tabu(noun, verb)
11
proscribed(offensive, irregular, unwarranted, criminal)
11
restricted(offensive, permitted, allowed, unthinkable)
11
unmentionable(permitted, allowed, unspeakable)
11
verboten(allow, illegal, allowed)
8
anathema(noun, bar, offensive, ban)
8
dirty
8
illegal(illegal, permitted, allowed)
8
indecent(coarse, vulgar, naughty, lustful)
7
bawdy(dirty, coarse, vulgar, indecent)
7
filthy(dirty, coarse, vulgar, indecent)
7
lewd(vulgar, indecent)
7
outlawed(permitted, allowed)
7
unacceptable(permitted, allowed)
7
unspeakable
6
obscene(dirty, coarse, vulgar, indecent)
6
off limits(expression, idiom, adverb, offensive)
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APASmart Define. (2015). taboo thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/taboo/thesaurus/synonyms
ChicagoSmart Define. 2015. "taboo thesaurus" https://smartdefine.org/taboo/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, taboo thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/taboo/thesaurus/synonyms>.
MLASmart Define. "taboo thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/taboo/thesaurus/synonyms>