British pound sterling vs British pound

British pound sterling and British pound both are nouns.

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

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

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

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

British pound sterling (noun)	British pound (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