niggler vs depreciation

niggler and depreciation both are nouns.

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

niggler (noun)	depreciation (noun)
someone who constantly criticizes in a petty way	a decrease in price or value
	a communication that belittles somebody or something
	decrease in value of an asset due to obsolescence or use