/ Thesaurus / G Synonyms of genus castilleja Find synonyms for: Noun1. Castilleja, genus Castilleja, Castilleia, genus Castilleia, asterid dicot genususage: genus of western North and South American perennials often partially parasitic on roots of grassesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language