Breadcrumb Home > Thesaurus > S Synonyms of spleen Find synonyms for: Noun 1. spleen, lien, lymphatic tissue, lymphoid tissue usage: a large dark-red oval organ on the left side of the body between the stomach and the diaphragm; produces cells involved in immune responses 2. irascibility, short temper, spleen, quick temper, bad temper, ill temper usage: a feeling of resentful anger WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of spleen (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: odaysuiz Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language