preclinical test vs preclinical phase

preclinical test and preclinical phase both are nouns.

Word	Noun	Adjective	Verb	Adverb
preclinical test	Yes	No	No	No
preclinical phase	Yes	No	No	No

As nouns, preclinical test and preclinical phase are synonyms defined as:

preclinical test and preclinical phase: a laboratory test of a new drug or a new invasive medical device on animal subjects; conducted to gather evidence justifying a clinical trial

Other synonyms of preclinical test include preclinical trial.

preclinical test (noun)	preclinical phase (noun)
a laboratory test of a new drug or a new invasive medical device on animal subjects; conducted to gather evidence justifying a clinical trial	a laboratory test of a new drug or a new invasive medical device on animal subjects; conducted to gather evidence justifying a clinical trial