rafter vs balk

rafter and balk both are nouns.

Word	Noun	Adjective	Verb	Adverb
rafter	Yes	No	Yes	No
balk	Yes	No	Yes	No

As nouns, rafter and balk are synonyms defined as:

rafter and balk: one of several parallel sloping beams that support a roof

Other synonyms of rafter include baulk.

rafter (noun)	balk (noun)
one of several parallel sloping beams that support a roof	an illegal pitching motion while runners are on base
someone who travels by raft	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

rafter (verb)	balk (verb)
provide (a ceiling) with rafters	refuse to comply