noun A noun is a person, place, thing, or idea. In this case, 'try out' can be used as a noun to refer to a test or trial of something.
verb A verb is a word that expresses an action or state of being. 'Try out' is primarily used as a verb to indicate the act of testing or experimenting with something.
preposition A preposition is a word that shows the relationship between a noun (or pronoun) and other words in a sentence. In the phrase 'try out', 'out' is a preposition that indicates the direction or extent of the action of trying.
noun a trial or test to evaluate someone's suitability for a particular role or activity