snapline vs snap line

snapline and snap line both are nouns.

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

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

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

Other synonyms of snapline include chalk line.

snapline (noun)	snap 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