mental testing vs mental test

mental testing and mental test both are nouns.

Word	Noun	Adjective	Verb	Adverb
mental testing	Yes	No	No	No
mental test	Yes	No	No	No

As nouns, mental testing and mental test are synonyms defined as:

mental testing and mental test: any standardized procedure for measuring sensitivity or memory or intelligence or aptitude or personality etc

Other synonyms of mental testing include psychometric test, test.

mental testing (noun)	mental test (noun)
any standardized procedure for measuring sensitivity or memory or intelligence or aptitude or personality etc	any standardized procedure for measuring sensitivity or memory or intelligence or aptitude or personality etc