lollipop woman vs U.K.

lollipop woman and U.K. both are nouns.

Word	Noun	Adjective	Verb	Adverb
lollipop woman	Yes	No	No	No
U.K.	Yes	No	No	No

lollipop woman (noun)	U.K. (noun)
a woman hired to help children cross a road safely near a school	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