Job vs Book of Job

Job and Book of Job both are nouns.

Word	Noun	Adjective	Verb	Adverb
Job	Yes	No	No	No
Book of Job	Yes	No	No	No

As nouns, Job and Book of Job are synonyms defined as:

Job and Book of Job: a book in the Old Testament containing Job's pleas to God about his afflictions and God's reply

Job (noun)	Book of Job (noun)
a book in the Old Testament containing Job's pleas to God about his afflictions and God's reply	a book in the Old Testament containing Job's pleas to God about his afflictions and God's reply
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