percolate vs diffuse

percolate is a noun but diffuse is not a noun.

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

As verbs, diffuse is a hypernym of percolate; that is, diffuse is a word with a broader meaning than percolate:

Other hypernyms of percolate include fan out, spread, spread out.

percolate (noun)	diffuse (noun)
the product of percolation

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

percolate (verb)	diffuse (verb)
gain or regain energy	cause to become widely known
pass through	spread or diffuse through
cause (a solvent) to pass through a permeable substance in order to extract a soluble constituent	move outward
prepare in a percolator
permeate or penetrate gradually
spread gradually