tube vs electric circuit

tube and electric circuit both are nouns.

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

tube (noun)	electric circuit (noun)
conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases	an electrical device that provides a path for electrical current to flow
an electric railway operating below the surface of the ground (usually in a city)
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
(anatomy) any hollow cylindrical body structure
a hollow cylindrical shape

tube (verb)	electric circuit (verb)
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