/ Thesaurus / M Synonyms of mountain alder Find synonyms for: Noun1. mountain maple, mountain alder, Acer spicatum, mapleusage: small shrubby maple of eastern North America; scarlet in autumn2. 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: dentifrice Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language