diffusion vs diffuse

diffusion is a noun but diffuse is not a noun.

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

diffusion (noun)	diffuse (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

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