depreciation vs knucklehead

depreciation and knucklehead both are nouns.

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

depreciation (noun)	knucklehead (noun)
a decrease in price or value	a stupid person; these words are used to express a low opinion of someone's intelligence
a communication that belittles somebody or something
decrease in value of an asset due to obsolescence or use