/ Thesaurus / O Synonyms of on an irregular basis Find synonyms for: Adverb1. irregularly, on an irregular basisusage: in an irregular manner; "her letters arrived irregularly"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language