cartridge has 2 distinct synonyms spread across 2 of its 4 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
ammunition consisting of a cylindrical casing containing an explosive charge and a bullet; fired from a rifle or handgun
a light-tight supply chamber holding the film and supplying it for exposure as required
Synonyms, antonyms and the broader and narrower relations for cartridge come from Princeton University’s WordNet. Full sources and licences.
a module designed to be inserted into a larger piece of equipment
“he loaded a cartridge of fresh tape into the tape deck”
an electro-acoustic transducer that is the part of the arm of a record player that holds the needle and that is removable