Christian Bible vs sacred text

Christian Bible and sacred text both are nouns.

Word	Noun	Adjective	Verb	Adverb
Christian Bible	Yes	No	No	No
sacred text	Yes	No	No	No

As nouns, sacred text is a hypernym of Christian Bible; that is, sacred text is a word with a broader meaning than Christian Bible:

Other hypernyms of Christian Bible include religious text, religious writing, sacred writing.

Christian Bible (noun)	sacred text (noun)
the sacred writings of the Christian religions	writing that is venerated for the worship of a deity