crystal microphone vs crystal mike

crystal microphone and crystal mike both are nouns.

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

As nouns, crystal microphone and crystal mike are synonyms defined as:

crystal microphone and crystal mike: a microphone in which sound waves vibrate a piezoelectric crystal that generates a varying voltage

crystal microphone (noun)	crystal mike (noun)
a microphone in which sound waves vibrate a piezoelectric crystal that generates a varying voltage	a microphone in which sound waves vibrate a piezoelectric crystal that generates a varying voltage