14
unique(adjective, feature, special, alone, singular)
8
special
4
matchless
4
rare(adjective, exceptional, exclusive, single, alone)
4
uncommon
3
distinct
3
incomparable
3
individual
3
peculiar
3
peerless
3
singular
3
unusual
2
inimitable
2
lone
2
offbeat
2
only
2
out-of-the-way
2
particular
2
separate
2
single
<123458>
11 years ago|2.6k views|share |citing 
APASmart Define. (2015). sui generis thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sui_generis/thesaurus/synonyms
ChicagoSmart Define. 2015. "sui generis thesaurus" https://smartdefine.org/sui_generis/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, sui generis thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sui_generis/thesaurus/synonyms>.
MLASmart Define. "sui generis thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/sui_generis/thesaurus/synonyms>