crystal microphone vs mike

crystal microphone and mike both are nouns.

Word	Noun	Adjective	Verb	Adverb
crystal microphone	Yes	No	No	No
mike	Yes	No	No	No

As nouns, mike is a hypernym of crystal microphone; that is, mike is a word with a broader meaning than crystal microphone:

crystal microphone: a microphone in which sound waves vibrate a piezoelectric crystal that generates a varying voltage
mike: device for converting sound waves into electrical energy

Other hypernyms of crystal microphone include mic, microphone.

crystal microphone (noun)	mike (noun)
a microphone in which sound waves vibrate a piezoelectric crystal that generates a varying voltage	device for converting sound waves into electrical energy