19 entries under permitted topic. ×

4
prohibited(offensive, prohibition, unmentionable)
3
unacceptable(offensive, immoral, shocking, prohibited)
2
beyond the pale(expression, idiom, offensive, prohibition)
2
forbidden(offensive, prohibited, unmentionable)
2
illegal(offensive, prohibition, prohibited, unmentionable)
2
taboo(adjective, allowed)
0
anathema(offensive, prohibited, unmentionable)
0
banned(offensive, prohibited, unmentionable)
0
disapproved(offensive, prohibited, unmentionable)
0
frowned on(expression, offensive, prohibited, unmentionable)
0
not allowed(expression, offensive, prohibited, unmentionable)
0
off limits(expression, offensive, prohibited, unmentionable)
0
out of bounds(expression, idiom, offensive, prohibited)
0
outlawed(offensive, prohibited, unmentionable)
0
proscribed(offensive, prohibited, unmentionable)
0
reserved(offensive, prohibited, unmentionable)
0
restricted(offensive, prohibited, unmentionable)
0
ruled out(expression, offensive, prohibited, unmentionable)
0
unmentionable(offensive, prohibited)
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APASmart Define. (2015). unthinkable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/unthinkable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unthinkable thesaurus" https://smartdefine.org/unthinkable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, unthinkable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/unthinkable/thesaurus/synonyms>.
MLASmart Define. "unthinkable thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/unthinkable/thesaurus/synonyms>