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. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language