/ Thesaurus / P Synonyms of pierre joseph proudhon Find synonyms for: Noun1. Proudhon, Pierre Joseph Proudhonusage: French socialist who argued that property is theft (1809-1865)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language