Noun

• S: (n) jam (preserve of crushed fruit)
• S: (n) fix, hole, jam, mess, muddle, pickle, kettle of fish (informal terms for a difficult situation) "he got into a terrible fix"; "he made a muddle of his marriage"
• S: (n) crush, jam, press (a dense crowd of people)
• S: (n) jamming, electronic jamming, jam (deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems)
• direct hyponym / full hyponym
• direct hypernym / inherited hypernym / sister term
• derivationally related form

Verb

• S: (v) throng, mob, pack, pile, jam (press tightly together or cram) "The crowd packed the auditorium"
• S: (v) jam (push down forcibly) "The driver jammed the brake pedal to the floor"
• S: (v) jam, crush (crush or bruise) "jam a toe"
• S: (v) jam, block (interfere with or prevent the reception of signals) "Jam the Voice of America"; "block the signals emitted by this station"
• S: (v) jam (get stuck and immobilized) "the mechanism jammed"
• S: (v) jam, jampack, ram, chock up, cram, wad (crowd or pack to capacity) "the theater was jampacked"
• S: (v) obstruct, obturate, impede, occlude, jam, block, close up (block passage through) "obstruct the path"