depreciation vs unknown

depreciation and unknown both are nouns.

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

depreciation (noun)	unknown (noun)
a decrease in price or value	a variable whose values are solutions of an equation
a communication that belittles somebody or something	an unknown and unexplored region
decrease in value of an asset due to obsolescence or use	anyone who does not belong in the environment in which they are found

depreciation (adjective)	unknown (adjective)
	not known
	being or having an unknown or unnamed source
	not famous or acclaimed
	not known before
	not known to exist