vision vs imaging

vision and imaging both are nouns.

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

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

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

vision (noun)	imaging (noun)
the ability to see; the visual faculty	(medicine) obtaining pictures of the interior of the body
the perceptual experience of seeing	the ability to form mental images of things or events
a vivid mental image
the formation of a mental image of something that is not perceived as real and is not present to the senses
a religious or mystical experience of a supernatural appearance