bandsaw vs band saw

bandsaw and band saw both are nouns.

Word	Noun	Adjective	Verb	Adverb
bandsaw	Yes	No	No	No
band saw	Yes	No	No	No

As nouns, bandsaw and band saw are synonyms defined as:

bandsaw and band saw: an endless saw consisting of a toothed metal band that is driven around two wheels

bandsaw (noun)	band saw (noun)
an endless saw consisting of a toothed metal band that is driven around two wheels	an endless saw consisting of a toothed metal band that is driven around two wheels