rejection vs human action

rejection and human action both are nouns.

Word	Noun	Adjective	Verb	Adverb
rejection	Yes	No	No	No
human action	Yes	No	No	No

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

Other hypernyms of rejection include act, deed, human activity.

rejection (noun)	human action (noun)
the act of rejecting something	something that people do or cause to happen
the speech act of rejecting
(medicine) an immunological response that refuses to accept substances or organisms that are recognized as foreign
the state of being rejected