depreciation vs maligner

depreciation and maligner both are nouns.

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

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