/ Thesaurus / A Synonyms of alnus rhombifolia Find synonyms for: Noun1. white alder, mountain alder, Alnus rhombifolia, alder, alder treeusage: tree of western United StatesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language