Bible vs sacred writing

Bible and sacred writing both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bible	Yes	No	No	No
sacred writing	Yes	No	No	No

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

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

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