dun vs bedevil

dun is a noun but bedevil is not a noun.

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

As verbs, dun and bedevil are synonyms defined as:

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

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

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

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