envisioning vs imaging

envisioning and imaging both are nouns.

Word	Noun	Adjective	Verb	Adverb
envisioning	Yes	No	No	No
imaging	Yes	No	No	No

As nouns, imaging is a hypernym of envisioning; that is, imaging is a word with a broader meaning than envisioning:

Other hypernyms of envisioning include imagery, imagination, mental imagery.

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