demodulator vs rectifier

demodulator and rectifier both are nouns.

Word	Noun	Adjective	Verb	Adverb
demodulator	Yes	No	No	No
rectifier	Yes	No	No	No

As nouns, rectifier is a hypernym of demodulator; that is, rectifier is a word with a broader meaning than demodulator:

demodulator: rectifier that extracts modulation from a radio carrier wave
rectifier: electrical device that transforms alternating into direct current

demodulator (noun)	rectifier (noun)
rectifier that extracts modulation from a radio carrier wave	electrical device that transforms alternating into direct current
	a person who corrects or sets right