depreciation vs sad sack

depreciation and sad sack both are nouns.

Word	Noun	Adjective	Verb	Adverb
depreciation	Yes	No	No	No
sad sack	Yes	No	No	No

depreciation (noun)	sad sack (noun)
a decrease in price or value	someone who makes mistakes because of incompetence
a communication that belittles somebody or something
decrease in value of an asset due to obsolescence or use