9
royal
7
impassable(adjective, closed)
4
bad
4
subpar
3
atrocious
3
famous
3
impenetrable
3
inadequate
3
niggardly
3
special
3
unacceptable
3
unsatisfactory
2
airtight
2
deficient
2
exceptional
2
impermeable
2
impervious
2
improper
2
insufferable
2
intolerable
<1234510>
10 years ago|3.2k views|share |citing 
APASmart Define. (2016). passable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/passable/thesaurus/antonyms
ChicagoSmart Define. 2016. "passable thesaurus" https://smartdefine.org/passable/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, passable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/passable/thesaurus/antonyms>.
MLASmart Define. "passable thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/passable/thesaurus/antonyms>