circuit vs tube

circuit and tube both are nouns.

Word	Noun	Adjective	Verb	Adverb
circuit	Yes	No	Yes	No
tube	Yes	No	Yes	No

circuit (noun)	tube (noun)
a journey or route all the way around a particular place or area	conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
movement once around a course	an electric railway operating below the surface of the ground (usually in a city)
an electrical device that provides a path for electrical current to flow	electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
a racetrack for automobile races	(anatomy) any hollow cylindrical body structure
(law) a judicial division of a state or the United States (so-called because originally judges traveled and held court in different locations); one of the twelve groups of states in the United States that is covered by a particular circuit court of appeals	a hollow cylindrical shape
an established itinerary of venues or events that a particular group of people travel to
the boundary line encompassing an area or object

circuit (verb)	tube (verb)
make a circuit	place or enclose in a tube
	convey in a tube
	ride or float on an inflated tube
	provide with a tube or insert a tube into