visualise vs image

visualise is not a noun while image is a noun.

Word	Noun	Adjective	Verb	Adverb
visualise	No	No	Yes	No
image	Yes	No	Yes	No

As verbs, visualise and image are synonyms defined as:

Other synonyms of visualise include envision, fancy, figure, picture, project, see, visualize.

As verbs, image is a hyponym of visualise; that is, image is a word with a more specific, narrower meaning than visualise:

visualise (noun)	image (noun)
	a visual representation (of an object or scene or person or abstraction) produced on a surface
	a representation of a person (especially in the form of sculpture)
	(Jungian psychology) a personal facade that one presents to the world
	the general impression that something (a person or organization or product) presents to the public
	an iconic mental representation
	a standard or typical example
	language used in a figurative or nonliteral sense
	(mathematics) the set of values of the dependent variable for which a function is defined
	someone who closely resembles a famous person (especially an actor)

visualise (verb)	image (verb)
make visible	imagine; conceive of; see in one's mind
imagine; conceive of; see in one's mind	render visible, as by means of MRI
form a mental picture of something that is invisible or abstract
view the outline of by means of an X-ray