decrepitation vs crepitation

decrepitation and crepitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
decrepitation	Yes	No	No	No
crepitation	Yes	No	No	No

As nouns, crepitation is a hypernym of decrepitation; that is, crepitation is a word with a broader meaning than decrepitation:

decrepitation: the crackling or breaking up of certain crystals when they are heated
crepitation: the sharp sound of snapping noises

Other hypernyms of decrepitation include crackle, crackling.

decrepitation (noun)	crepitation (noun)
the crackling or breaking up of certain crystals when they are heated	the sharp sound of snapping noises