possible action vs option

possible action and option both are nouns.

Word	Noun	Adjective	Verb	Adverb
possible action	Yes	No	No	No
option	Yes	No	No	No

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

Other hypernyms of possible action include alternative, choice.

possible action (noun)	option (noun)
a possible alternative	the act of choosing or selecting
	one of a number of things from which only one can be chosen
	the right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited