instigator vs depreciation

instigator and depreciation both are nouns.

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

instigator (noun)	depreciation (noun)
a person who initiates a course of action	a decrease in price or value
someone who deliberately foments trouble	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use