band saw vs power saw

band saw and power saw both are nouns.

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

As nouns, power saw is a hypernym of band saw; that is, power 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
power saw: a power tool for cutting wood

Other hypernyms of band saw include saw, sawing machine.

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