stopcock vs spigot

stopcock and spigot both are nouns.

Word	Noun	Adjective	Verb	Adverb
stopcock	Yes	No	No	No
spigot	Yes	No	No	No

As nouns, spigot is a hypernym of stopcock; that is, spigot is a word with a broader meaning than stopcock:

stopcock: faucet consisting of a rotating device for regulating flow of a liquid
spigot: a regulator for controlling the flow of a liquid from a reservoir

Other hypernyms of stopcock include faucet.

stopcock (noun)	spigot (noun)
faucet consisting of a rotating device for regulating flow of a liquid	a regulator for controlling the flow of a liquid from a reservoir
	a plug for a bunghole in a cask