/ Thesaurus / P Synonyms of petty officer Find synonyms for: Noun1. petty officer, PO, P.O., noncommissioned officer, noncom, enlisted officerusage: a noncommissioned officer in the Navy or Coast Guard with a rank comparable to sergeant in the ArmyWordNet 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