17
unsystematic(adjective, casual, confused, variable, erratic)
16
fitful(adjective, rough, strange, unstable, fantastic)
16
queer(adjective, wrong, unusual, strange, exceptional)
16
atypical(adjective, good, wrong, excellent, extraordinary)
16
bizarre(adjective, unusual, strange, wonderful, exceptional)
16
haphazard(adjective, adverb, organization, plan, insignificant)
16
occasional(adjective, chance, casual, rare, variable)
15
jagged(adjective, mean, rough, coarse, uneven)
15
extraordinary(adjective, wrong, excellent, unusual, strange)
15
intermittent(adjective, rough, uncertain, unpredictable, unreliable)
15
uncommon(adjective, excellent, extraordinary, unusual, strange)
15
unnatural(adjective, good, wrong, flat, extraordinary)
15
unorganized
14
changeable(adjective, rough, lively, uncertain, active)
14
inconstant(adjective, lively, uncertain, active, unstable)
14
singular(adjective, wrong, unusual, strange, special)
14
spasmodic(adjective, rough, unstable, unsettled, unpredictable)
14
uncertain(adjective, unstable, chance, doubtful, unsettled)
14
unorthodox(adjective, wrong, extraordinary, unusual, strange)
14
weird(adjective, unusual, strange, wonderful, exceptional)
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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>