decrement vs narrowing

decrement and narrowing both are nouns.

Word	Noun	Adjective	Verb	Adverb
decrement	Yes	No	No	No
narrowing	Yes	Yes	No	No

As nouns, narrowing is a hyponym of decrement; that is, narrowing is a word with a more specific, narrower meaning than decrement:

Other hyponyms of decrement include decay, decline, decline, diminution, desensitisation, desensitization, slippage, wastage.

decrement (noun)	narrowing (noun)
the amount by which something decreases	the act of making something narrower
a process of becoming smaller or shorter	an instance of becoming narrow
	a decrease in width

decrement (adjective)	narrowing (adjective)
	(of circumstances) tending to constrict freedom
	becoming gradually narrower