expanse vs orbit

expanse and orbit both are nouns.

Word	Noun	Adjective	Verb	Adverb
expanse	Yes	No	No	No
orbit	Yes	No	Yes	No

As nouns, orbit is a hypernym of expanse; that is, orbit is a word with a broader meaning than expanse:

Other hypernyms of expanse include ambit, compass, range, reach, scope.

expanse (noun)	orbit (noun)
the extent of a 2-dimensional surface enclosed within a boundary	an area in which something acts or operates or has power or control:
a wide scope	the bony cavity in the skull containing the eyeball
a wide and open space or area as of surface or land or sky	the (usually elliptical) path described by one celestial body in its revolution about another
	the path of an electron around the nucleus of an atom
	a particular environment or walk of life

expanse (verb)	orbit (verb)
	move in an orbit