/ Thesaurus / S Synonyms of second lieutenant Find synonyms for: Noun1. second lieutenant, 2nd lieutenant, lieutenantusage: a commissioned officer in the Army or Air Force or Marine Corps holding the lowest rankWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language