visualisation vs visual image

visualisation and visual image both are nouns.

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

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

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

Other synonyms of visualisation include visualization.

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