res publica vs estate

res publica and estate both are nouns.

Word	Noun	Adjective	Verb	Adverb
res publica	Yes	No	No	No
estate	Yes	No	No	No

res publica (noun)	estate (noun)
a politically organized body of people under a single government	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
	extensive landed property (especially in the country) retained by the owner for his own use
	everything you own; all of your assets (whether real property or personal property) and liabilities