depreciation vs plaguey

depreciation is a noun but plaguey is not a noun.

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

depreciation (noun)	plaguey (noun)
a decrease in price or value
a communication that belittles somebody or something
decrease in value of an asset due to obsolescence or use

depreciation (adjective)	plaguey (adjective)
	causing irritation or annoyance
	likely to spread and cause an epidemic disease

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