spillway vs conduit

spillway and conduit both are nouns.

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

As nouns, conduit is a hypernym of spillway; that is, conduit is a word with a broader meaning than spillway:

spillway: a channel that carries excess water over or around a dam or other obstruction
conduit: a passage (a pipe or tunnel) through which water or electric wires can pass

spillway (noun)	conduit (noun)
a channel that carries excess water over or around a dam or other obstruction	a passage (a pipe or tunnel) through which water or electric wires can pass