know-it-all vs depreciation

know-it-all and depreciation both are nouns.

Word	Noun	Adjective	Verb	Adverb
know-it-all	Yes	No	No	No
depreciation	Yes	No	No	No

know-it-all (noun)	depreciation (noun)
someone who thinks he knows everything and refuses to accept advice or information from others	a decrease in price or value
	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use