pilot project vs trial

pilot project and trial both are nouns.

Word	Noun	Adjective	Verb	Adverb
pilot project	Yes	No	No	No
trial	Yes	No	No	No

As nouns, trial is a hypernym of pilot project; that is, trial is a word with a broader meaning than pilot project:

Other hypernyms of pilot project include run, test.

pilot project (noun)	trial (noun)
activity planned as a test or trial	the act of testing something
	(law) the determination of a person's innocence or guilt by due process of law
	the act of undergoing testing
	trying something to find out about it
	an annoying or frustrating or catastrophic event
	(sports) a preliminary competition to determine qualifications