/ Thesaurus / B Synonyms of buck sergeant Find synonyms for: Noun1. buck sergeant, police sergeant, sergeantusage: a sergeant of the lowest rank in the militaryWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language