annihilation vs disintegration

annihilation and disintegration both are nouns.

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

As nouns, annihilation and disintegration are synonyms defined as:

annihilation (noun)	disintegration (noun)
destruction by annihilating something	total destruction
total destruction	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