principal vs depreciation

principal and depreciation both are nouns.

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

principal (noun)	depreciation (noun)
the educator who has executive authority for a school	a decrease in price or value
an actor who plays a principal role	a communication that belittles somebody or something
the major party to a financial transaction at a stock exchange; buys and sells for his own account	decrease in value of an asset due to obsolescence or use
(criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement
the original amount of a debt on which interest is calculated
capital as contrasted with the income derived from it

principal (adjective)	depreciation (adjective)
most important element