Great Britain vs MOT test

Great Britain and MOT test both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
MOT test	Yes	No	No	No

Great Britain (noun)	MOT test (noun)
an island comprising England and Scotland and Wales	a compulsory annual test of older motor vehicles for safety and exhaust fumes
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