perambulation vs United Kingdom of Great Britain and Northern Ireland

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

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

perambulation (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a leisurely walk (usually in some public place)	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
a walk around a territory (a parish or manor or forest etc.) in order to officially assert and record its boundaries