surface area vs acreage

surface area and acreage both are nouns.

Word	Noun	Adjective	Verb	Adverb
surface area	Yes	No	No	No
acreage	Yes	No	No	No

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

surface area: the extent of a 2-dimensional surface enclosed within a boundary
acreage: an area of ground used for some particular purpose (such as building or farming)

Other hyponyms of surface area include land area, footprint, erasure, blank space, place, space, space, balk, baulk, plane section, section.

surface area (noun)	acreage (noun)
the extent of a 2-dimensional surface enclosed within a boundary	an area of ground used for some particular purpose (such as building or farming)