Obadiah vs Book of Obadiah

Obadiah and Book of Obadiah both are nouns.

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

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

Obadiah and Book of Obadiah: an Old Testament book telling Obadiah's prophecies; the shortest book in the Christian Bible

Other synonyms of Obadiah include Abdias.

Obadiah (noun)	Book of Obadiah (noun)
an Old Testament book telling Obadiah's prophecies; the shortest book in the Christian Bible	an Old Testament book telling Obadiah's prophecies; the shortest book in the Christian Bible
a Hebrew minor prophet, he was chosen to prophesy against Edom