pitched battle vs second battle of Ypres

pitched battle and second battle of Ypres both are nouns.

Word	Noun	Adjective	Verb	Adverb
pitched battle	Yes	No	No	No
second battle of Ypres	Yes	No	No	No

pitched battle (noun)	second battle of Ypres (noun)
a fierce battle fought in close combat between troops in predetermined positions at a chosen time and place	battle in World War I (1915); Germans wanted to try chlorine (a toxic yellow gas) as a weapon and succeeded in taking considerable territory from the Allied salient