Belleau Wood vs pitched battle

Belleau Wood and pitched battle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Belleau Wood	Yes	No	No	No
pitched battle	Yes	No	No	No

Belleau Wood (noun)	pitched battle (noun)
a World War I battle in northwestern France where the Allies defeated the Germans in 1918	a fierce battle fought in close combat between troops in predetermined positions at a chosen time and place