Great Britain vs fish slice

Great Britain and fish slice both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
fish slice	Yes	No	No	No

Great Britain (noun)	fish slice (noun)
an island comprising England and Scotland and Wales	a food turner with a broad blade used for turning or serving fish or other food that is cooked in a frying pan
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