stopcock vs turncock

stopcock and turncock both are nouns.

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

As nouns, stopcock and turncock are synonyms defined as:

stopcock and turncock: faucet consisting of a rotating device for regulating flow of a liquid

Other synonyms of stopcock include cock.

stopcock (noun)	turncock (noun)
faucet consisting of a rotating device for regulating flow of a liquid	faucet consisting of a rotating device for regulating flow of a liquid
	one employed to control water supply by turning water mains on and off