/ Thesaurus / P Synonyms of peter i Find synonyms for: Noun1. Peter I, Czar Peter I, Peter the Greatusage: czar of Russia who introduced ideas from western Europe to reform the government; he extended his territories in the Baltic and founded St. Petersburg (1682-1725)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language