Book of Judges vs Judges

Book of Judges and Judges both are nouns.

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

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

Book of Judges and Judges: a book of the Old Testament that tells the history of Israel under the leaders known as judges

Book of Judges (noun)	Judges (noun)
a book of the Old Testament that tells the history of Israel under the leaders known as judges	a book of the Old Testament that tells the history of Israel under the leaders known as judges