/ Thesaurus / P Synonyms of plymouth rock Find synonyms for: Noun1. Plymouth Rockusage: a boulder in Plymouth supposed to be where the Pilgrims disembarked from the Mayflower2. Plymouth Rock, domestic fowl, fowl, poultryusage: an American breed of domestic fowlWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language