decrescendo vs decrease

decrescendo and decrease both are nouns.

Word	Noun	Adjective	Verb	Adverb
decrescendo	Yes	Yes	Yes	No
decrease	Yes	No	Yes	No

As verbs, decrease is a hypernym of decrescendo; that is, decrease is a word with a broader meaning than decrescendo:

Other hypernyms of decrescendo include diminish, fall, lessen.

decrescendo (noun)	decrease (noun)
(music) a gradual decrease in loudness	the act of decreasing or reducing something
	the amount by which something decreases
	a change downward
	a process of becoming smaller or shorter

decrescendo (adjective)	decrease (adjective)
(music) gradually decreasing in volume

decrescendo (verb)	decrease (verb)
grow quieter	decrease in size, extent, or range
	make become smaller