actinide vs grouping

actinide and grouping both are nouns.

Word	Noun	Adjective	Verb	Adverb
actinide	Yes	No	No	No
grouping	Yes	No	No	No

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

actinide: any of a series of radioactive elements with atomic numbers 89 through 103
grouping: any number of entities (members) considered as a unit

Other hypernyms of actinide include group.

actinide (noun)	grouping (noun)
any of a series of radioactive elements with atomic numbers 89 through 103	any number of entities (members) considered as a unit
	the activity of putting things together in groups
	a system for classifying things into groups