sleeper vs depreciation

sleeper and depreciation both are nouns.

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

sleeper (noun)	depreciation (noun)
an unexpected hit	a decrease in price or value
tropical fish that resembles a goby and rests quietly on the bottom in shallow water	a communication that belittles somebody or something
a passenger car that has berths for sleeping	decrease in value of an asset due to obsolescence or use
one of the cross braces that support the rails on a railway track
a piece of furniture that can be opened up into a bed
pajamas with feet; worn by children
a rester who is sleeping
an unexpected achiever of success
a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signal