Great Britain vs limited company

Great Britain and limited company both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
limited company	Yes	No	No	No

Great Britain (noun)	limited company (noun)
an island comprising England and Scotland and Wales	a company that is organized to give its owners limited liability
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