Breadcrumb Home > Thesaurus > F Synonyms of fortieth Find synonyms for: Noun 1. fortieth, rank usage: position 40 in a countable series of things Adjective 1. fortieth, 40th, ordinal (vs. cardinal) usage: the ordinal number of forty in counting order WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of fortieth (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: eponymous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language