Job vs Old Testament

Job and Old Testament both are nouns.

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

Job (noun)	Old Testament (noun)
a book in the Old Testament containing Job's pleas to God about his afflictions and God's reply	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
a Jewish hero in the Old Testament who maintained his faith in God in spite of afflictions that tested him
any long-suffering person who withstands affliction without despairing