/ Thesaurus / R Synonyms of river thames Find synonyms for: Noun1. Thames, River Thames, Thames Riverusage: the longest river in England; flows eastward through London to the North SeaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language