Breadcrumb Home > Thesaurus > X Synonyms of xv Find synonyms for: Noun 1. fifteen, 15, XV, large integer usage: the cardinal number that is the sum of fourteen and one Adjective 1. fifteen, 15, xv, cardinal (vs. ordinal) usage: being one more than fourteen WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. TrendingHere are the facts and trivia that people are buzzing about. The Book of Philippians: Summary Current Events This Week: May 2023 Preamble of the United Nations Charter Queen Victoria Books of the Bible: New Testament Books in Order The 88 Recognized Constellations ✖ Related Content Daily Word Quiz: foison Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language