/ Thesaurus / N Synonyms of niagara falls Find synonyms for: Noun1. Niagara, Niagara Fallsusage: waterfall in Canada is the Horseshoe Falls; in the United States it is the American Falls2. Niagara Fallsusage: a city in western New York State at the falls of the Niagara river; tourist attraction and honeymoon resortWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language