snapline vs chalk line

snapline and chalk line both are nouns.

Word	Noun	Adjective	Verb	Adverb
snapline	Yes	No	No	No
chalk line	Yes	No	No	No

As nouns, snapline and chalk line are synonyms defined as:

snapline and chalk line: a chalked string used in the building trades to make a straight line on a vertical surface

Other synonyms of snapline include snap line.

snapline (noun)	chalk line (noun)
a chalked string used in the building trades to make a straight line on a vertical surface	a chalked string used in the building trades to make a straight line on a vertical surface