field trial vs field test

field trial and field test both are nouns.

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

As nouns, field trial and field test are synonyms defined as:

field trial and field test: a test of the performance of some new product under the conditions in which it will be used

field trial (noun)	field test (noun)
a test of young hunting dogs to determine their skill in pointing and retrieving	a test of the performance of some new product under the conditions in which it will be used
a test of the performance of some new product under the conditions in which it will be used
a contest between gun dogs to determine their proficiency in pointing and retrieving