apparatus vs electrograph

Other hyponyms of apparatus include aerator, burner, cascade liquefier, centrifuge, extractor, separator, chemical reactor, condenser, copier, duplicator, 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, X-ray machine, scintigraph, scintiscanner, atmoradiograph, memory apparatus, mnemometer, whirling table, calorisator, calorizator, chromatograph, disinfector, defecator, pasteuriser, pasteurizer, adsorber.