maligner vs depreciation

maligner and depreciation both are nouns.

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

maligner (noun)	depreciation (noun)
one who attacks the reputation of another by slander or libel	a decrease in price or value
	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use