audition vs try out

audition is a noun but try out is not a noun.

Word	Noun	Adjective	Verb	Adverb
audition	Yes	No	Yes	No
try out	No	No	Yes	No

As verbs, audition and try out are synonyms defined as:

audition (noun)	try out (noun)
a test of the suitability of a performer
the ability to hear; the auditory faculty

audition (verb)	try out (verb)
perform in order to get a role	take a sample of
	perform in order to get a role
	put to the test, as for its quality, or give experimental use to
	try something new, as in order to gain experience