expanse vs baulk

expanse and baulk both are nouns.

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

As nouns, baulk is a hyponym of expanse; that is, baulk is a word with a more specific, narrower meaning than expanse:

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

expanse (noun)	baulk (noun)
the extent of a 2-dimensional surface enclosed within a boundary	one of several parallel sloping beams that support a roof
a wide scope	something immaterial that interferes with or delays action or progress
a wide and open space or area as of surface or land or sky	the area on a billiard table behind the balkline

expanse (verb)	baulk (verb)
	refuse to comply