transaction vs group action

transaction and group action both are nouns.

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

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

transaction: the act of transacting within or between groups (as carrying on commercial activities)
group action: action taken by a group of people

transaction (noun)	group action (noun)
the act of transacting within or between groups (as carrying on commercial activities)	action taken by a group of people