survival vs natural selection

survival and natural selection both are nouns.

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

As nouns, survival and natural selection are synonyms defined as:

survival and natural selection: a natural process resulting in the evolution of organisms best adapted to the environment

Other synonyms of survival include selection, survival of the fittest.

survival (noun)	natural selection (noun)
something that survives	a natural process resulting in the evolution of organisms best adapted to the environment
a natural process resulting in the evolution of organisms best adapted to the environment
a state of surviving; remaining alive