Great Britain vs Higher National Diploma

Great Britain and Higher National Diploma both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
Higher National Diploma	Yes	No	No	No

Great Britain (noun)	Higher National Diploma (noun)
an island comprising England and Scotland and Wales	a diploma given for vocational training that prepares the student for a career in a particular area; good students may progress to a course leading to a degree
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