British pound sterling vs pound sterling

British pound sterling and pound sterling both are nouns.

Word	Noun	Adjective	Verb	Adverb
British pound sterling	Yes	No	No	No
pound sterling	Yes	No	No	No

As nouns, British pound sterling and pound sterling are synonyms defined as:

British pound sterling and pound sterling: the basic unit of money in Great Britain and Northern Ireland; equal to 100 pence

Other synonyms of British pound sterling include British pound, pound, quid.

British pound sterling (noun)	pound sterling (noun)
the basic unit of money in Great Britain and Northern Ireland; equal to 100 pence	the basic unit of money in Great Britain and Northern Ireland; equal to 100 pence