Britain vs peppercorn rent

Britain and peppercorn rent both are nouns.

Word	Noun	Adjective	Verb	Adverb
Britain	Yes	No	No	No
peppercorn rent	Yes	No	No	No

Britain (noun)	peppercorn rent (noun)
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	very low or nominal rent