bump off vs depreciation

bump off is not a noun while depreciation is a noun.

Word	Noun	Adjective	Verb	Adverb
bump off	No	No	Yes	No
depreciation	Yes	No	No	No

bump off (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

bump off (verb)	depreciation (verb)
kill intentionally and with premeditation