Commons vs estate of the realm

Commons and estate of the realm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Commons	Yes	No	No	No
estate of the realm	Yes	No	No	No

As nouns, estate of the realm is a hypernym of Commons; that is, estate of the realm is a word with a broader meaning than Commons:

Commons: the common people
estate of the realm: a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights

Other hypernyms of Commons include estate, the three estates.

Commons (noun)	estate of the realm (noun)
the common people	a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights