depreciation vs megalomaniac

depreciation and megalomaniac both are nouns.

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

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