chosen vs elite group

chosen and elite group both are nouns.

Word	Noun	Adjective	Verb	Adverb
chosen	Yes	No	No	No
elite group	Yes	No	No	No

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

chosen: an exclusive group of people
elite group: a group or class of persons enjoying superior intellectual or social or economic status

Other hypernyms of chosen include elite.

chosen (noun)	elite group (noun)
an exclusive group of people	a group or class of persons enjoying superior intellectual or social or economic status
one who is the object of choice; who is given preference