province vs domain

province and domain both are nouns.

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

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

Other hypernyms of province include area, arena, field, orbit, sphere.

province (noun)	domain (noun)
the territory occupied by one of the constituent administrative districts of a nation	the content of a particular field of knowledge
the proper sphere or extent of your activities	people in general; especially a distinctive group of people with some shared interest
	(mathematics) the set of values of the independent variable for which a function is defined
	territory over which rule or control is exercised
	a particular environment or walk of life