bedevil vs dun

bedevil is not a noun while dun is a noun.

Word	Noun	Adjective	Verb	Adverb
bedevil	No	No	Yes	No
dun	Yes	Yes	Yes	No

As verbs, bedevil and dun are synonyms defined as:

Other synonyms of bedevil include crucify, frustrate, rag, torment.

bedevil (noun)	dun (noun)
	horse of a dull brownish grey color
	a color or pigment varying around a light grey-brown color

bedevil (adjective)	dun (adjective)
	of a dull greyish brown to brownish grey color

bedevil (verb)	dun (verb)
be confusing or perplexing to; cause to be unable to think clearly	make a dun color
treat cruelly	cure by salting
	persistently ask for overdue payment
	treat cruelly