Italian region vs province

Italian region and province both are nouns.

Word	Noun	Adjective	Verb	Adverb
Italian region	Yes	No	No	No
province	Yes	No	No	No

As nouns, province is a hypernym of Italian region; that is, province is a word with a broader meaning than Italian region:

Italian region: Italy is divided into 20 regions for administrative purposes
province: the territory occupied by one of the constituent administrative districts of a nation

Other hypernyms of Italian region include state.

Italian region (noun)	province (noun)
Italy is divided into 20 regions for administrative purposes	the territory occupied by one of the constituent administrative districts of a nation
	the proper sphere or extent of your activities