audition vs ear

audition and ear both are nouns.

Word	Noun	Adjective	Verb	Adverb
audition	Yes	No	Yes	No
ear	Yes	No	No	No

As nouns, ear is a hyponym of audition; that is, ear is a word with a more specific, narrower meaning than audition:

Other hyponyms of audition include absolute pitch, perfect pitch.

audition (noun)	ear (noun)
a test of the suitability of a performer	the sense organ for hearing and equilibrium
the ability to hear; the auditory faculty	the externally visible cartilaginous structure of the external ear
	good hearing
	attention to what is said
	fruiting spike of a cereal plant especially corn

audition (verb)	ear (verb)
perform in order to get a role