Breadcrumb Home > Thesaurus > S Synonyms of seashell Find synonyms for: Noun1. seashell, shellusage: the shell of a marine organismWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of seashell (Dictionary) ✖ Related Content Daily Word Quiz: hortatory Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language