Breadcrumb Home > Thesaurus > F Synonyms of fifthly Find synonyms for: Adverb 1. fifthly usage: in the fifth place; "fifthly, we must adhere to the rules set by the local government" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of fifthly (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