alliance vs group action

alliance and group action both are nouns.

Word	Noun	Adjective	Verb	Adverb
alliance	Yes	No	No	No
group action	Yes	No	No	No

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

alliance (noun)	group action (noun)
the act of forming an alliance or confederation	action taken by a group of people
a formal agreement establishing an association or alliance between nations or other groups to achieve a particular aim
an organization of people (or countries) involved in a pact or treaty
a connection based on kinship or marriage or common interest
the state of being allied or confederated