circuit vs United Kingdom of Great Britain and Northern Ireland

circuit and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
circuit	Yes	No	Yes	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

circuit (noun)	United Kingdom of Great Britain and Northern Ireland (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)	United Kingdom of Great Britain and Northern Ireland (verb)
make a circuit