pitched battle vs Battle of Buena Vista

pitched battle and Battle of Buena Vista both are nouns.

Word	Noun	Adjective	Verb	Adverb
pitched battle	Yes	No	No	No
Battle of Buena Vista	Yes	No	No	No

pitched battle (noun)	Battle of Buena Vista (noun)
a fierce battle fought in close combat between troops in predetermined positions at a chosen time and place	a pitched battle in the Mexican War in 1847; United States forces under Zachary Taylor defeated the Mexican forces under Santa Anna at a locality in northern Mexico