depreciation vs principal

depreciation and principal both are nouns.

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

depreciation (noun)	principal (noun)
a decrease in price or value	the educator who has executive authority for a school
a communication that belittles somebody or something	an actor who plays a principal role
decrease in value of an asset due to obsolescence or use	the major party to a financial transaction at a stock exchange; buys and sells for his own account
	(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

depreciation (adjective)	principal (adjective)
	most important element