audition vs screen test

audition and screen test both are nouns.

Word	Noun	Adjective	Verb	Adverb
audition	Yes	No	Yes	No
screen test	Yes	No	No	No

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

audition (noun)	screen test (noun)
a test of the suitability of a performer	a filmed audition of an actor or actress
the ability to hear; the auditory faculty

audition (verb)	screen test (verb)
perform in order to get a role