Breadcrumb Home > Thesaurus > W Synonyms of willamette Find synonyms for: Noun1. Willamette, Willamette Riverusage: a river in western Oregon that flows north into the Columbia River near PortlandWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of willamette (Dictionary) ✖ Related Content Daily Word Quiz: legerdemain Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language