tube vs circuit

tube and circuit both are nouns.

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

tube (noun)	circuit (noun)
conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases	a journey or route all the way around a particular place or area
an electric railway operating below the surface of the ground (usually in a city)	movement once around a course
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope	an electrical device that provides a path for electrical current to flow
(anatomy) any hollow cylindrical body structure	a racetrack for automobile races
a hollow cylindrical shape	(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
	an established itinerary of venues or events that a particular group of people travel to
	the boundary line encompassing an area or object

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