depreciation vs knocker

depreciation and knocker both are nouns.

Word	Noun	Adjective	Verb	Adverb
depreciation	Yes	No	No	No
knocker	Yes	No	No	No

depreciation (noun)	knocker (noun)
a decrease in price or value	a device (usually metal and ornamental) attached by a hinge to a door
a communication that belittles somebody or something	either of two soft fleshy milk-secreting glandular organs on the chest of a woman
decrease in value of an asset due to obsolescence or use	one who disparages or belittles the worth of something
	a person who knocks (as seeking to gain admittance)
	(Yiddish) a big shot who knows it and acts that way; a boastful immoderate person