Breadcrumb Home > Thesaurus Cite Synonyms of sipunculid Find synonyms for: Noun1. peanut worm, sipunculid, invertebrateusage: small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanutWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.See also: sipunculid (Dictionary) Related Content Daily Word Quiz: apotheosis Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language Synonyms Index