/ Thesaurus / B Synonyms of brittle star Find synonyms for: Noun1. brittle star, brittle-star, serpent star, echinodermusage: an animal resembling a starfish with fragile whiplike arms radiating from a small central discWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: entomology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language