involution vs group action

involution and group action both are nouns.

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

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

involution (noun)	group action (noun)
the action of enfolding something	action taken by a group of people
the process of raising a quantity to some assigned power
the act of sharing in the activities of a group
marked by elaborately complex detail
a long and intricate and complicated grammatical construction
reduction in size of an organ or part (as in the return of the uterus to normal size after childbirth)