trial vs field test

trial and field test both are nouns.

Word	Noun	Adjective	Verb	Adverb
trial	Yes	No	No	No
field test	Yes	No	No	No

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

trial: trying something to find out about it
field test: a test of the performance of some new product under the conditions in which it will be used

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

trial (noun)	field test (noun)
the act of testing something	a test of the performance of some new product under the conditions in which it will be used
(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