bon ton vs elite group

bon ton and elite group both are nouns.

Word	Noun	Adjective	Verb	Adverb
bon ton	Yes	No	No	No
elite group	Yes	No	No	No

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

bon ton: the fashionable elite
elite group: a group or class of persons enjoying superior intellectual or social or economic status

Other hypernyms of bon ton include elite.

bon ton (noun)	elite group (noun)
the fashionable elite	a group or class of persons enjoying superior intellectual or social or economic status