vision vs imagery

vision and imagery both are nouns.

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

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

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

vision (noun)	imagery (noun)
the ability to see; the visual faculty	the ability to form mental images of things or events
the perceptual experience of seeing
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