electrical circuit vs relay

electrical circuit and relay both are nouns.

Word	Noun	Adjective	Verb	Adverb
electrical circuit	Yes	No	No	No
relay	Yes	No	Yes	No

electrical circuit (noun)	relay (noun)
an electrical device that provides a path for electrical current to flow	the act of passing something along from one person or group to another
	electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuit
	a race between teams; each member runs or swims part of the distance
	a crew of workers who relieve another crew
	a fresh team to relieve weary draft animals

electrical circuit (verb)	relay (verb)
	pass along
	control or operate by relay