Old Testament vs Jacob

Old Testament and Jacob both are nouns.

Word	Noun	Adjective	Verb	Adverb
Old Testament	Yes	No	No	No
Jacob	Yes	No	No	No

Old Testament (noun)	Jacob (noun)
the collection of books comprising the sacred scripture of the Hebrews and recording their history as the chosen people; the first half of the Christian Bible	(Old Testament) son of Isaac; brother of Esau; father of the twelve patriarchs of Israel; Jacob wrestled with God and forced God to bless him, so God gave Jacob the new name of Israel (meaning `one who has been strong against God')
	French biochemist who (with Jacques Monod) studied regulatory processes in cells (born in 1920)