Breadcrumb Home > Thesaurus > E Synonyms of eighteen Find synonyms for: Noun 1. eighteen, 18, XVIII, large integer usage: the cardinal number that is the sum of seventeen and one Adjective 1. eighteen, 18, xviii, cardinal (vs. ordinal) usage: being one more than seventeen WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of eighteen (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. The Book of 1 Corinthians: Summary Current Events This Week: June 2023 Languages Spoken in Each Country of the World Aesop's Fables: Aesop's Fables Milestones in Environmental Protection The 12 Labors of Hercules (In Order) ✖ Related Content Daily Word Quiz: rort Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language