dullard vs depreciation

dullard and depreciation both are nouns.

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

dullard (noun)	depreciation (noun)
a person who evokes boredom	a decrease in price or value
a person who is not very bright	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use