Breadcrumb Home > Thesaurus > P Synonyms of platte river penstemon Find synonyms for: Noun1. Platte River penstemon, Penstemon cyananthus, wildflower, wild flowerusage: erect plant with blue-violet flowers in rings near tips of stems; Idaho to Utah and WyomingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: sepulture Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language