footprint vs surface area

footprint and surface area both are nouns.

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

As nouns, surface area is a hypernym of footprint; that is, surface area is a word with a broader meaning than footprint:

footprint: the area taken up by some object
surface area: the extent of a 2-dimensional surface enclosed within a boundary

Other hypernyms of footprint include area, expanse.

footprint (noun)	surface area (noun)
the area taken up by some object	the extent of a 2-dimensional surface enclosed within a boundary
a mark of a foot or shoe on a surface
a trace suggesting that something was once present or felt or otherwise important