/ Thesaurus / O Synonyms of opossum rat Find synonyms for: Noun1. opossum rat, marsupial, pouched mammalusage: terrestrial marsupials of southern South America that resemble shrewsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language