embouchure vs aperture

embouchure and aperture both are nouns.

Word	Noun	Adjective	Verb	Adverb
embouchure	Yes	No	No	No
aperture	Yes	No	No	No

As nouns, aperture is a hypernym of embouchure; that is, aperture is a word with a broader meaning than embouchure:

embouchure: the aperture of a wind instrument into which the player blows directly
aperture: an man-made opening; usually small

embouchure (noun)	aperture (noun)
the aperture of a wind instrument into which the player blows directly	an man-made opening; usually small
	a device that controls amount of light admitted
	a natural opening in something