pitched battle vs Battle of Gettysburg

pitched battle and Battle of Gettysburg both are nouns.

Word	Noun	Adjective	Verb	Adverb
pitched battle	Yes	No	No	No
Battle of Gettysburg	Yes	No	No	No

pitched battle (noun)	Battle of Gettysburg (noun)
a fierce battle fought in close combat between troops in predetermined positions at a chosen time and place	a battle of the American Civil War (1863); the defeat of Robert E. Lee's invading Confederate Army was a major victory for the Union