pesky vs depreciation

pesky is not a noun while depreciation is a noun.

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

pesky (noun)	depreciation (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

pesky (adjective)	depreciation (adjective)
causing irritation or annoyance