self-destruction vs self-annihilation

self-destruction and self-annihilation both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-destruction	Yes	No	No	No
self-annihilation	Yes	No	No	No

As nouns, self-destruction and self-annihilation are synonyms defined as:

Other synonyms of self-destruction include suicide.

self-destruction (noun)	self-annihilation (noun)
the act of killing yourself	the act of killing yourself
the act of destroying yourself