/ Thesaurus / P Synonyms of po river Find synonyms for: Noun1. Po, Po Riverusage: a European river; flows into the Adriatic SeaWordNet 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