area vs province

area and province both are nouns.

Word	Noun	Adjective	Verb	Adverb
area	Yes	No	No	No
province	Yes	No	No	No

As nouns, province is a hyponym of area; that is, province is a word with a more specific, narrower meaning than area:

area (noun)	province (noun)
a part of a structure having some specific characteristic or function	the territory occupied by one of the constituent administrative districts of a nation
the extent of a 2-dimensional surface enclosed within a boundary	the proper sphere or extent of your activities
a part of an animal that has a special function or is supplied by a given artery or nerve
a subject of study
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
a particular environment or walk of life