disintegration vs annihilation

disintegration and annihilation both are nouns.

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

As nouns, disintegration and annihilation are synonyms defined as:

disintegration (noun)	annihilation (noun)
total destruction	destruction by annihilating something
separation into component parts	total destruction
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