Breadcrumb Home > Thesaurus > F Synonyms of fifteen 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.Definition and meaning of fifteen (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: atavistic Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language