Breadcrumb Home > Thesaurus > C Synonyms of cardboard Find synonyms for: Noun 1. cardboard, composition board, paper, packing material, packing, wadding usage: a stiff moderately thick paper Adjective 1. cardboard, unlifelike, artificial (vs. natural), unreal usage: without substance; "cardboard caricatures of historical figures" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of cardboard (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: obscurant Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language