mass murderer vs depreciation

mass murderer and depreciation both are nouns.

Word	Noun	Adjective	Verb	Adverb
mass murderer	Yes	No	No	No
depreciation	Yes	No	No	No

mass murderer (noun)	depreciation (noun)
a person who is responsible for the deaths of many victims in a single incident	a decrease in price or value
	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use