38 entries under unique topic. ×

21
rare(adjective, weak, slight, excellent, poor)
18
uncommon(adjective, slight, excellent, thin, extraordinary)
16
unusual(adjective, excellent, extraordinary, exceptional, usual)
15
sparse(adjective, slight, thin, certain, strange)
14
occasional(adjective, slight, thin, strange, exceptional)
12
sporadic(adjective, slight, thin, unusual, strange)
11
scarce(adjective, weak, slight, excellent, poor)
8
few(adjective, unusual, strange, exceptional, special)
8
scanty(adjective, weak, slight, poor, thin)
7
exceptional(adjective, excellent, extraordinary, unusual, strange)
7
singular(adjective, excellent, extraordinary, unusual, exceptional)
7
unwonted(adjective, unusual, strange, exceptional, special)
6
deficient(adjective, poor, strange, exceptional, inadequate)
6
irregular(adjective, excellent, extraordinary, unusual, special)
6
limited(adjective, strange, exceptional, inadequate, valuable)
6
odd(adjective, excellent, extraordinary, unusual, strange)
6
seldom(adjective, adverb, slight, unusual, strange)
5
strange(adjective, excellent, extraordinary, unusual, exceptional)
4
extraordinary(adjective, excellent, unusual, strange, exceptional)
3
atypical(adjective, excellent, extraordinary, strange, special)
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APASmart Define. (2015). infrequent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/infrequent/thesaurus/synonyms
ChicagoSmart Define. 2015. "infrequent thesaurus" https://smartdefine.org/infrequent/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, infrequent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/infrequent/thesaurus/synonyms>.
MLASmart Define. "infrequent thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/infrequent/thesaurus/synonyms>