extermination vs disintegration

extermination and disintegration both are nouns.

Word	Noun	Adjective	Verb	Adverb
extermination	Yes	No	No	No
disintegration	Yes	No	No	No

As nouns, disintegration is a hypernym of extermination; that is, disintegration is a word with a broader meaning than extermination:

Other hypernyms of extermination include annihilation.

extermination (noun)	disintegration (noun)
the act of exterminating	total destruction
complete annihilation	separation into component parts
	the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
	in a decomposed state
	a loss (or serious disruption) of organization in some system