apparatus vs aerator

Other hyponyms of apparatus include 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, X-ray machine, scintigraph, scintiscanner, atmoradiograph, memory apparatus, mnemometer, whirling table, calorisator, calorizator, chromatograph, disinfector, defecator, pasteuriser, pasteurizer, adsorber.