57 entries under unusual topic. ×

21
rare(adjective, weak, slight, excellent, poor)
18
uncommon(adjective, slight, excellent, thin, extraordinary)
12
sporadic(adjective, slight, thin, strange)
11
scarce(adjective, weak, slight, excellent, poor)
8
few(adjective, strange, exceptional, special)
7
exceptional(adjective, excellent, extraordinary, strange)
7
singular(adjective, excellent, extraordinary, exceptional)
7
unwonted(adjective, strange, exceptional, special)
6
irregular(adjective, excellent, extraordinary, special)
6
odd(adjective, excellent, extraordinary, strange)
6
seldom(adjective, adverb, slight, strange)
5
strange(adjective, excellent, extraordinary, exceptional)
4
extraordinary(adjective, excellent, strange, exceptional)
4
unprecedented(adjective, excellent, special, brilliant)
3
peculiar(adjective, excellent, special, brilliant)
3
remarkable(adjective, excellent, extraordinary, strange)
3
unfamiliar(adjective, special, rare, scarce)
3
unparalleled(adjective, special, rare, scarce)
2
abnormal(adjective, excellent, extraordinary, strange)
2
bizarre(adjective, special, rare, scarce)
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APASmart Define. (2015). infrequent thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/infrequent/thesaurus/synonyms
ChicagoSmart Define. 2015. "infrequent thesaurus" https://smartdefine.org/infrequent/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, infrequent thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/infrequent/thesaurus/synonyms>.
MLASmart Define. "infrequent thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/infrequent/thesaurus/synonyms>