suicide vs self-destruction

suicide and self-destruction both are nouns.

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

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

Other synonyms of suicide include self-annihilation.

suicide (noun)	self-destruction (noun)
the act of killing yourself	the act of killing yourself
a person who kills himself intentionally	the act of destroying yourself