intelligentsia vs elite group

intelligentsia and elite group both are nouns.

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

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

intelligentsia: an educated and intellectual elite
elite group: a group or class of persons enjoying superior intellectual or social or economic status

Other hypernyms of intelligentsia include elite.

intelligentsia (noun)	elite group (noun)
an educated and intellectual elite	a group or class of persons enjoying superior intellectual or social or economic status