depreciation vs brainless

depreciation is a noun but brainless is not a noun.

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

depreciation (noun)	brainless (noun)
a decrease in price or value
a communication that belittles somebody or something
decrease in value of an asset due to obsolescence or use

depreciation (adjective)	brainless (adjective)
	not using intelligence