/ Thesaurus / J Synonyms of jam packed Find synonyms for: Verb1. jam, jampack, ram, chock up, cram, wad, stuffusage: crowd or pack to capacity; "the theater was jampacked"Adjective1. jammed, jam-packed, packed, crowded (vs. uncrowded)usage: filled to capacity; "a suitcase jammed with dirty clothes"; "stands jam-packed with fans"; "a packed theater"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language