once in blue moon

as innow and then

as inoccasionally
as inon and off
as inonce in a while
as inrarely
as inseldom
as insometimes
as insporadically
as inhardly

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Synonyms for once in blue moon

adv once in a while

More words related to once in blue moon

rarely

adverb. not often; exceptionally

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.