/ Thesaurus / G Synonyms of giant clam Find synonyms for: Noun1. giant clam, Tridacna gigas, clamusage: a large clam inhabiting reefs in the southern Pacific and weighing up to 500 poundsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language