circuit vs U.K.

circuit and U.K. both are nouns.

Word	Noun	Adjective	Verb	Adverb
circuit	Yes	No	Yes	No
U.K.	Yes	No	No	No

circuit (noun)	U.K. (noun)
a journey or route all the way around a particular place or area	a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom
movement once around a course
an electrical device that provides a path for electrical current to flow
a racetrack for automobile races
(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

circuit (verb)	U.K. (verb)
make a circuit