plague vs bedevil

plague is a noun but bedevil is not a noun.

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

As verbs, bedevil is a hyponym of plague; that is, bedevil is a word with a more specific, narrower meaning than plague:

Other hyponyms of plague include goad, needle, crucify, dun, frustrate, rag, torment, haze.

plague (noun)	bedevil (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

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