British East Africa vs British Empire

British East Africa and British Empire both are nouns.

Word	Noun	Adjective	Verb	Adverb
British East Africa	Yes	No	No	No
British Empire	Yes	No	No	No

British East Africa (noun)	British Empire (noun)
the former British territories of eastern Africa, including Kenya, Tanganyika, Uganda, and Zanzibar	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