survival vs natural action

survival and natural action both are nouns.

Word	Noun	Adjective	Verb	Adverb
survival	Yes	No	No	No
natural action	Yes	No	No	No

As nouns, natural action is a hypernym of survival; that is, natural action is a word with a broader meaning than survival:

survival: a natural process resulting in the evolution of organisms best adapted to the environment
natural action: a process existing in or produced by nature (rather than by the intent of human beings)

Other hypernyms of survival include action, activity, natural process.

survival (noun)	natural action (noun)
something that survives	a process existing in or produced by nature (rather than by the intent of human beings)
a natural process resulting in the evolution of organisms best adapted to the environment
a state of surviving; remaining alive