/ Thesaurus / O Synonyms of order nudibranchia Find synonyms for: Noun1. Nudibranchia, order Nudibranchia, animal orderusage: comprising numerous marine gastropod mollusks lacking a shell in the adult state and usually having a body like a slugWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language