Great Britain vs ratability

Great Britain and ratability both are nouns.

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

Great Britain (noun)	ratability (noun)
an island comprising England and Scotland and Wales	the quality of being capable of being rated or estimated
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 state of being liable to assessment or taxation