Belleau Wood vs Battle of the Marne

Belleau Wood and Battle of the Marne both are nouns.

Word	Noun	Adjective	Verb	Adverb
Belleau Wood	Yes	No	No	No
Battle of the Marne	Yes	No	No	No

As nouns, Belleau Wood and Battle of the Marne are synonyms defined as:

Belleau Wood and Battle of the Marne: a World War I battle in northwestern France where the Allies defeated the Germans in 1918

Other synonyms of Belleau Wood include Chateau-Thierry, Marne River, Second Battle of the Marne.

Belleau Wood (noun)	Battle of the Marne (noun)
a World War I battle in northwestern France where the Allies defeated the Germans in 1918	a World War I battle in northwestern France where the Allies defeated the Germans in 1918