/ Thesaurus / F Synonyms of first amendment Find synonyms for: Noun1. First Amendmentusage: an amendment to the Constitution of the United States guaranteeing the right of free expression; includes freedom of assembly and freedom of the press and freedom of religion and freedom of speechWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language