depreciation vs dirty dog

depreciation and dirty dog both are nouns.

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

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