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33
erratic(adjective, character, extraordinary, unusual, strange)
31
uneven(adjective, mean, smooth, rough, strange)
24
aberrant(adjective, good, excellent, extraordinary, unusual)
22
capricious(adjective, unusual, strange, lively, uncertain)
22
sporadic(adjective, unusual, special, variable, broken)
21
eccentric(adjective, character, extraordinary, unusual, strange)
20
disorderly(adjective, adverb, disorder, wrong, improper)
18
variable(adjective, rough, lively, uncertain, active)
17
unsystematic(adjective, casual, confused, variable, erratic)
16
fitful(adjective, rough, strange, unstable, fantastic)
16
haphazard(adjective, adverb, organization, plan, insignificant)
16
occasional(adjective, chance, casual, rare, variable)
15
intermittent(adjective, rough, uncertain, unpredictable, unreliable)
14
changeable(adjective, rough, lively, uncertain, active)
14
inconstant(adjective, lively, uncertain, active, unstable)
14
spasmodic(adjective, rough, unstable, unsettled, unpredictable)
14
uncertain(adjective, unstable, chance, doubtful, unsettled)
13
unsteady(adjective, rough, active, unstable, unsettled)
12
casual(adjective, careless, chance, variable, erratic)
12
desultory(adjective, mean, disorder, rough, insignificant)
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APASmart Define. (2016). irregular thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/irregular/thesaurus/synonyms
ChicagoSmart Define. 2016. "irregular thesaurus" https://smartdefine.org/irregular/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, irregular thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/irregular/thesaurus/synonyms>.
MLASmart Define. "irregular thesaurus" 1 April 2016. Web. 20 September 2026. <https://smartdefine.org/irregular/thesaurus/synonyms>