crystal mike vs crystal microphone

crystal mike and crystal microphone both are nouns.

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

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

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

crystal mike (noun)	crystal microphone (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