Breadcrumb Home > Thesaurus > B Synonyms of bullpen Find synonyms for: Noun 1. bullpen, area usage: a place on a baseball field where relief pitchers can warm up during a game 2. bullpen, detention cell, detention centre, cell, jail cell, prison cell usage: a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of bullpen (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: evanescent Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language