digging up vs human action

digging up and human action both are nouns.

Word	Noun	Adjective	Verb	Adverb
digging up	Yes	No	No	No
human action	Yes	No	No	No

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

digging up: the act of digging something up out of the ground (especially a corpse) where it has been buried
human action: something that people do or cause to happen

Other hypernyms of digging up include act, deed, human activity.

digging up (noun)	human action (noun)
the act of digging something up out of the ground (especially a corpse) where it has been buried	something that people do or cause to happen