power saw vs scroll saw

power saw and scroll saw both are nouns.

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

As nouns, scroll saw is a hyponym of power saw; that is, scroll saw is a word with a more specific, narrower meaning than power saw:

power saw: a power tool for cutting wood
scroll saw: fine-toothed power saw with a narrow blade; used to cut curved outlines

power saw (noun)	scroll saw (noun)
a power tool for cutting wood	fine-toothed power saw with a narrow blade; used to cut curved outlines