balk vs surface area

balk and surface area both are nouns.

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

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

balk: the area on a billiard table behind the balkline
surface area: the extent of a 2-dimensional surface enclosed within a boundary

Other hypernyms of balk include area, expanse.

balk (noun)	surface area (noun)
an illegal pitching motion while runners are on base	the extent of a 2-dimensional surface enclosed within a boundary
one of several parallel sloping beams that support a roof
something immaterial that interferes with or delays action or progress
the area on a billiard table behind the balkline

balk (verb)	surface area (verb)
refuse to comply