apparatus vs X-ray machine

Other hyponyms of apparatus include aerator, burner, cascade liquefier, centrifuge, extractor, separator, chemical reactor, condenser, copier, duplicator, electrograph, generator, heat pump, heliograph, brooder, incubator, instillator, Kipp's apparatus, lighting, nuclear reactor, reactor, optical bench, pendulum, purifier, reformer, semaphore, sequenator, sequencer, soda fountain, still, submersible, telegraph, telegraphy, titrator, scintigraph, scintiscanner, atmoradiograph, memory apparatus, mnemometer, whirling table, calorisator, calorizator, chromatograph, disinfector, defecator, pasteuriser, pasteurizer, adsorber.