4
irregularly(adverb, manner, rareness, scarceness)
4
peculiarly(adverb, manner, rareness, scarceness)
4
uncommonly(adverb, manner, rareness, scarceness)
4
unusually(adverb, manner, rareness, scarceness)
2
almost never(expression, manner, rareness, scarceness)
2
barely(adverb, manner, rareness, scarceness)
2
exceptionally(adverb, manner, rareness, scarceness)
2
hardly(adverb, manner, rareness, scarceness)
2
hardly ever(expression, manner, rareness, scarceness)
2
in few instances(expression, manner, rareness, scarceness)
2
infrequently(adverb, manner, rareness, scarceness)
2
not often(expression, manner, rareness, scarceness)
2
not regularly(expression, manner, rareness, scarceness)
2
not very often(expression, manner, rareness, scarceness)
2
occasionally(adverb, manner, rareness, scarceness)
2
on occasion(expression, manner, rareness, scarceness)
2
on rare occasions(expression, manner, rareness, scarceness)
2
once in a while(expression, manner, rareness, scarceness)
2
once in blue moon(expression, manner, rareness, scarceness)
2
particularly(adverb, manner, rareness, scarceness)
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APASmart Define. (1970). most commonly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/most_commonly/thesaurus/antonyms
ChicagoSmart Define. 1970. "most commonly thesaurus" https://smartdefine.org/most_commonly/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 1970, most commonly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/most_commonly/thesaurus/antonyms>.
MLASmart Define. "most commonly thesaurus" 1 January 1970. Web. 23 September 2026. <https://smartdefine.org/most_commonly/thesaurus/antonyms>