Breadcrumb Home > Thesaurus > X Synonyms of xc Find synonyms for: Noun 1. ninety, 90, XC, large integer usage: the cardinal number that is the product of ten and nine Adjective 1. ninety, 90, xc, cardinal (vs. ordinal) usage: being ten more than eighty WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of xc (Dictionary) 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