18 entries under irregular topic. ×

6
unusual(adjective, bad, new, common)
6
abnormal(adjective, new, common, normal)
6
uncommon(adjective, new, ordinary, different)
4
strange(adjective, bad, poor, new, boring)
4
atypical(adjective, new, typical, nonconforming)
4
eccentric(adjective, reasonable, unusual, new)
4
exceptional(adjective, common, insignificant, unimportant)
4
rare(adjective, new, exceptional, infrequent)
3
different(adjective, new, common, ordinary)
2
infrequent(adjective, new, frequent, regularly)
2
new(adjective, common, experienced, additional)
2
occasional(adjective, new, regular, sporadic)
2
unconventional(adjective, new, odd, different)
1
foreign(adjective, new)
1
original(adjective, new, standard)
1
unfamiliar(adjective, strange, new, common)
0
inconstant(adjective, new)
0
unsteady(adjective, new)
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APASmart Define. (2016). usual thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/usual/thesaurus/antonyms
ChicagoSmart Define. 2016. "usual thesaurus" https://smartdefine.org/usual/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, usual thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/usual/thesaurus/antonyms>.
MLASmart Define. "usual thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/usual/thesaurus/antonyms>