book token vs Britain

book token and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
book token	Yes	No	No	No
Britain	Yes	No	No	No

book token (noun)	Britain (noun)
a gift voucher that can be exchanged for books costing up to an amount given on the voucher	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