/ Thesaurus / A Synonyms of all day long Find synonyms for: Adverb1. daylong, all day longusage: during the entire day; "light pours daylong into the parlor"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language