assurance vs U.K.

assurance and U.K. both are nouns.

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

assurance (noun)	U.K. (noun)
freedom from doubt; belief in yourself and your abilities	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 statement intended to inspire confidence
a binding commitment to do or give or refrain from something
a British term for some kinds of insurance