British Empire vs British Isles

British Empire and British Isles both are nouns.

Word	Noun	Adjective	Verb	Adverb
British Empire	Yes	No	No	No
British Isles	Yes	No	No	No

British Empire (noun)	British Isles (noun)
a former empire consisting of Great Britain and all the territories under its control; reached its greatest extent at the end of World War I; it included the British Isles, British West Indies, Canada, British Guiana, British West Africa, British East Africa, India, Australia, New Zealand	Great Britain and Ireland and adjacent islands in the north Atlantic