expanse vs ambit

expanse and ambit both are nouns.

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

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

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

expanse (noun)	ambit (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
a wide and open space or area as of surface or land or sky