Great Britain vs macintosh

Great Britain and macintosh both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
macintosh	Yes	No	No	No

Great Britain (noun)	macintosh (noun)
an island comprising England and Scotland and Wales	a waterproof raincoat made of rubberized fabric
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	a lightweight waterproof (usually rubberized) fabric