heathland vs Britain

heathland and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
heathland	Yes	No	No	No
Britain	Yes	No	No	No

heathland (noun)	Britain (noun)
a tract of level wasteland; uncultivated land with sandy soil and scrubby vegetation	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