imaging vs mental imagery

imaging and mental imagery both are nouns.

Word	Noun	Adjective	Verb	Adverb
imaging	Yes	No	No	No
mental imagery	Yes	No	No	No

As nouns, imaging and mental imagery are synonyms defined as:

imaging and mental imagery: the ability to form mental images of things or events

Other synonyms of imaging include imagery, imagination.

imaging (noun)	mental imagery (noun)
(medicine) obtaining pictures of the interior of the body	the ability to form mental images of things or events
the ability to form mental images of things or events