human beings vs grouping

human beings and grouping both are nouns.

Word	Noun	Adjective	Verb	Adverb
human beings	Yes	No	No	No
grouping	Yes	No	No	No

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

Other hypernyms of human beings include group, homo, human, human being, man.

human beings (noun)	grouping (noun)
all of the living human inhabitants of the earth	any number of entities (members) considered as a unit
	the activity of putting things together in groups
	a system for classifying things into groups