snap line vs snapline

snap line and snapline both are nouns.

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

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

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

Other synonyms of snap line include chalk line.

snap line (noun)	snapline (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