plaguey vs epidemic

plaguey is not a noun while epidemic is a noun.

Word	Noun	Adjective	Verb	Adverb
plaguey	No	Yes	No	Yes
epidemic	Yes	Yes	No	No

plaguey (noun)	epidemic (noun)
	a widespread outbreak of an infectious disease; many people are infected at the same time

plaguey (adjective)	epidemic (adjective)
causing irritation or annoyance	(especially of medicine) of disease or anything resembling a disease; attacking or affecting many individuals in a community or a population simultaneously
likely to spread and cause an epidemic disease

plaguey (adverb)	epidemic (adverb)
in a pernicious or annoying manner