wharf rat vs depreciation

wharf rat and depreciation both are nouns.

Word	Noun	Adjective	Verb	Adverb
wharf rat	Yes	No	No	No
depreciation	Yes	No	No	No

wharf rat (noun)	depreciation (noun)
brown rat that infests wharves	a decrease in price or value
someone who lives near wharves and lives by pilfering from ships or warehouses	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use