Breadcrumb Home > Thesaurus > E Synonyms of eighteenth Find synonyms for: Noun 1. eighteenth, rank usage: position 18 in a countable series of things Adjective 1. eighteenth, 18th, ordinal (vs. cardinal) usage: coming next after the seventeenth in position WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of eighteenth (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Who's Who in the "Lord of the Rings" Roman Catholic Church Hierarchy Current Events This Week: March 2023 42 Top Western Movie Quotes Slaves in the Family User's Guide to Environmental Language ✖ Related Content Daily Word Quiz: invidious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language