surface area vs space

surface area and space both are nouns.

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

As nouns, space is a hyponym of surface area; that is, space 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
space: a blank area

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

surface area (noun)	space (noun)
the extent of a 2-dimensional surface enclosed within a boundary	the unlimited expanse in which everything is located
	(printing) a block of type without a raised letter; used for spacing between words or sentences
	a blank character used to separate successive words in writing or printing
	a blank area
	one of the areas between or below or above the lines of a musical staff
	an area reserved for some particular purpose
	any location outside the Earth's atmosphere
	an empty area (usually bounded in some way between things)
	the interval between two times

surface area (verb)	space (verb)
	place at intervals