selection vs action

selection and action both are nouns.

Word	Noun	Adjective	Verb	Adverb
selection	Yes	No	No	No
action	Yes	No	Yes	No

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

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

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

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

selection (noun)	action (noun)
the act of choosing or selecting	the most important or interesting work or activity in a specific area or field
the person or thing chosen or selected	a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong
a passage selected from a larger work	something done (usually as opposed to something said)
an assortment of things from which a choice can be made	a military engagement
a natural process resulting in the evolution of organisms best adapted to the environment	an act by a government body or supranational organization
	the operating part that transmits power to a mechanism
	In firearms terminology, the mechanism that handles the ammunition (loads, locks, fires, and extracts the cartridges).
	the trait of being active and energetic and forceful
	the series of events that form a plot
	a process existing in or produced by nature (rather than by the intent of human beings)
	the state of being active

selection (verb)	action (verb)
	put in effect
	institute legal proceedings against; file a suit against