Christian Bible vs Book

Christian Bible and Book both are nouns.

Word	Noun	Adjective	Verb	Adverb
Christian Bible	Yes	No	No	No
Book	Yes	No	No	No

As nouns, Christian Bible and Book are synonyms defined as:

Christian Bible and Book: the sacred writings of the Christian religions

Other synonyms of Christian Bible include Bible, Good Book, Holy Scripture, Holy Writ, Scripture, Word, Word of God.

Christian Bible (noun)	Book (noun)
the sacred writings of the Christian religions	the sacred writings of the Christian religions
	the sacred writings of Islam revealed by God to the prophet Muhammad during his life at Mecca and Medina