depreciation vs bump off

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

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

depreciation (noun)	bump off (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

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