diffuse vs broadcast

diffuse is not a noun while broadcast is a noun.

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

As verbs, diffuse and broadcast are synonyms defined as:

diffuse (noun)	broadcast (noun)
	message that is transmitted by radio or television
	a radio or television show

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

diffuse (verb)	broadcast (verb)
cause to become widely known	cause to become widely known
spread or diffuse through	broadcast over the airwaves, as in radio or television
move outward	sow over a wide area, especially by hand