visual image vs visualization

visual image and visualization both are nouns.

Word	Noun	Adjective	Verb	Adverb
visual image	Yes	No	No	No
visualization	Yes	No	No	No

As nouns, visual image and visualization are synonyms defined as:

visual image and visualization: a mental image that is similar to a visual perception

Other synonyms of visual image include visualisation.

visual image (noun)	visualization (noun)
a percept that arises from the eyes; an image in the visual system	a mental image that is similar to a visual perception
a mental image that is similar to a visual perception