/ Thesaurus / R Synonyms of round clam Find synonyms for: Noun1. quahaug, quahog, hard-shell clam, round clam, clamusage: Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes2. quahog, quahaug, hard-shell clam, hard clam, round clam, Venus mercenaria, Mercenaria mercenaria, clamusage: an edible American clam; the heavy shells were used as money by some American IndiansWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language