/ Thesaurus / B Synonyms of bill of attainder Find synonyms for: Noun1. bill of attainder, bill, measureusage: a legislative act finding a person guilty of treason or felony without a trial; "bills of attainder are prohibited by the Constitution of the United States"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: magnanimous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language