once in a blue moon
see definition of once in a blue moonRelevance ranks synonyms and suggests the best matches based on how closely a synonym’s sense matches the sense you selected.
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Synonyms for once in a blue moon
adv once in a whilenow and then
adverb. once in a while
on and off
adverb. intermittently
once in a while
adverb. occasionally
seldom
adverb. infrequently
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