Breadcrumb Home > Thesaurus > I Cite Synonyms of intruder Find synonyms for: Noun1. intruder, interloper, trespasser, entrant, unwelcome person, persona non gratausage: someone who intrudes on the privacy or property of another without permissionWordNet 3.0 Copyright 2006 by Princeton University. All rights reserved. TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress The Women's March on Versailles Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: suigeneris Analogy of the Day: Today?s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language