cold water vs depreciation

cold water and depreciation both are nouns.

Word	Noun	Adjective	Verb	Adverb
cold water	Yes	No	No	No
depreciation	Yes	No	No	No

As nouns, depreciation is a hypernym of cold water; that is, depreciation is a word with a broader meaning than cold water:

Other hypernyms of cold water include derogation, disparagement.

cold water (noun)	depreciation (noun)
disparagement of a plan or hope or expectation	a decrease in price or value
	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use