Anglo-Saxon vs Great Britain

Anglo-Saxon and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
Anglo-Saxon	Yes	Yes	No	No
Great Britain	Yes	No	No	No

Anglo-Saxon (noun)	Great Britain (noun)
English prior to about 1100	an island comprising England and Scotland and Wales
a native or inhabitant of England prior to the Norman Conquest	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
a person of Anglo-Saxon (especially British) descent whose native tongue is English and whose culture is strongly influenced by English culture as in WASP for `White Anglo-Saxon Protestant'

Anglo-Saxon (adjective)	Great Britain (adjective)
of or relating to the Anglo-Saxons or their language