diffuse vs diffusion

diffuse is not a noun while diffusion is a noun.

Word	Noun	Adjective	Verb	Adverb
diffuse	No	Yes	Yes	No
diffusion	Yes	No	No	No

diffuse (noun)	diffusion (noun)
	the act of dispersing or diffusing something
	the property of being diffused or dispersed
	the spread of social institutions (and myths and skills) from one society to another
	(physics) the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration

diffuse (adjective)	diffusion (adjective)
(of light) transmitted from a broad light source or reflected
spread out; not concentrated in one place
lacking conciseness