oscillograph vs recorder

oscillograph and recorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
oscillograph	Yes	No	No	No
recorder	Yes	No	No	No

As nouns, recorder is a hypernym of oscillograph; that is, recorder is a word with a broader meaning than oscillograph:

oscillograph: a device for making a record of the wave forms of fluctuating voltages or currents
recorder: equipment for making records

Other hypernyms of oscillograph include recording equipment, recording machine.

oscillograph (noun)	recorder (noun)
a device for making a record of the wave forms of fluctuating voltages or currents	a tubular wind instrument with 8 finger holes and a fipple mouthpiece
	equipment for making records
	someone responsible for keeping records
	a barrister or solicitor who serves as part-time judge in towns or boroughs