dirty dog vs depreciation

dirty dog and depreciation both are nouns.

Word	Noun	Adjective	Verb	Adverb
dirty dog	Yes	No	No	No
depreciation	Yes	No	No	No

dirty dog (noun)	depreciation (noun)
a person who is deemed to be despicable or contemptible	a decrease in price or value
	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use