trial run vs beta test

trial run and beta test both are nouns.

Word	Noun	Adjective	Verb	Adverb
trial run	Yes	No	No	No
beta test	Yes	No	No	No

As nouns, beta test is a hyponym of trial run; that is, beta test is a word with a more specific, narrower meaning than trial run:

trial run: trying something to find out about it
beta test: (computer science) a second test of an experimental product (such as computer software) carried out by an outside organization

Other hyponyms of trial run include field test, field trial, alpha test, road test, trial balloon.

trial run (noun)	beta test (noun)
trying something to find out about it	(computer science) a second test of an experimental product (such as computer software) carried out by an outside organization