baulk-line vs string line

baulk-line and string line both are nouns.

Word	Noun	Adjective	Verb	Adverb
baulk-line	Yes	No	No	No
string line	Yes	No	No	No

As nouns, baulk-line and string line are synonyms defined as:

baulk-line and string line: line across a billiard table behind which the cue balls are placed at the start of a game

Other synonyms of baulk-line include balkline.

baulk-line (noun)	string line (noun)
line across a billiard table behind which the cue balls are placed at the start of a game	line across a billiard table behind which the cue balls are placed at the start of a game