/ Thesaurus / A Synonyms of afl cio Find synonyms for: Noun1. American Federation of Labor and Congress of Industrial Organizations, AFL-CIO, federationusage: the largest federation of North American labor unions; formed in 1955WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language