bedevil vs plague

bedevil is not a noun while plague is a noun.

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

As verbs, plague is a hypernym of bedevil; that is, plague is a word with a broader meaning than bedevil:

Other hypernyms of bedevil include beset, chevvy, chevy, chivvy, chivy, harass, harry, hassle, molest, provoke.

bedevil (noun)	plague (noun)
	an annoyance
	any large scale calamity (especially when thought to be sent by God)
	a swarm of insects that attack plants
	a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal
	any epidemic disease with a high death rate

bedevil (verb)	plague (verb)
be confusing or perplexing to; cause to be unable to think clearly	annoy continually or chronically
treat cruelly	cause to suffer a blight