United Kingdom of Great Britain and Northern Ireland vs headship

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	headship (noun)
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	the position of head
	the position of headmaster or headmistress