Ahvenanmaa vs Aaland islands

Ahvenanmaa and Aaland islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ahvenanmaa	Yes	No	No	No
Aaland islands	Yes	No	No	No

As nouns, Ahvenanmaa and Aaland islands are synonyms defined as:

Ahvenanmaa and Aaland islands: an archipelago of some 6,000 islands in the Gulf of Bothnia under Finnish control

Other synonyms of Ahvenanmaa include Aland islands.

Ahvenanmaa (noun)	Aaland islands (noun)
an archipelago of some 6,000 islands in the Gulf of Bothnia under Finnish control	an archipelago of some 6,000 islands in the Gulf of Bothnia under Finnish control