band saw vs saw

band saw and saw both are nouns.

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

As nouns, saw is a hypernym of band saw; that is, saw is a word with a broader meaning than band saw:

band saw: an endless saw consisting of a toothed metal band that is driven around two wheels
saw: a power tool for cutting wood

Other hypernyms of band saw include power saw, sawing machine.

band saw (noun)	saw (noun)
an endless saw consisting of a toothed metal band that is driven around two wheels	hand tool having a toothed blade for cutting
	a power tool for cutting wood
	a condensed but memorable saying embodying some important fact of experience that is taken as true by many people

band saw (verb)	saw (verb)
	cut with a saw