conduit vs penstock

conduit and penstock both are nouns.

Word	Noun	Adjective	Verb	Adverb
conduit	Yes	No	No	No
penstock	Yes	No	No	No

As nouns, penstock is a hyponym of conduit; that is, penstock is a word with a more specific, narrower meaning than conduit:

conduit: a passage (a pipe or tunnel) through which water or electric wires can pass
penstock: conduit that carries a rapid flow of water controlled by a sluicegate

conduit (noun)	penstock (noun)
a passage (a pipe or tunnel) through which water or electric wires can pass	conduit that carries a rapid flow of water controlled by a sluicegate
	regulator consisting of a valve or gate that controls the rate of water flow through a sluice