sphere vs province

sphere and province both are nouns.

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

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

sphere (noun)	province (noun)
any spherically shaped artifact	the territory occupied by one of the constituent administrative districts of a nation
a particular aspect of life or activity	the proper sphere or extent of your activities
the geographical area in which one nation is very influential
the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
a solid figure bounded by a spherical surface (including the space it encloses)
a three-dimensional closed surface such that every point on the surface is equidistant from the center
a particular environment or walk of life