/ Thesaurus / S Synonyms of seven day Find synonyms for: Adjective1. weeklong, seven-day, long (vs. short)usage: lasting through a week; "her weeklong vacation"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language