Chalons vs pitched battle

Chalons and pitched battle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chalons	Yes	No	No	No
pitched battle	Yes	No	No	No

Chalons (noun)	pitched battle (noun)
the battle in which Attila the Hun was defeated by the Romans and Visigoths in 451	a fierce battle fought in close combat between troops in predetermined positions at a chosen time and place