depreciation vs Billy the Kid

depreciation and Billy the Kid both are nouns.

Word	Noun	Adjective	Verb	Adverb
depreciation	Yes	No	No	No
Billy the Kid	Yes	No	No	No

depreciation (noun)	Billy the Kid (noun)
a decrease in price or value	United States outlaw who was said to have killed 21 men (1859-1881)
a communication that belittles somebody or something
decrease in value of an asset due to obsolescence or use