/ Thesaurus / P Synonyms of platte river Find synonyms for: Noun1. Platte, Platte Riverusage: a river in Nebraska that flows eastward to become a tributary of the Missouri RiverWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language