sacred text vs religious writing

sacred text and religious writing both are nouns.

Word	Noun	Adjective	Verb	Adverb
sacred text	Yes	No	No	No
religious writing	Yes	No	No	No

As nouns, sacred text and religious writing are synonyms defined as:

sacred text and religious writing: writing that is venerated for the worship of a deity

Other synonyms of sacred text include religious text, sacred writing.

sacred text (noun)	religious writing (noun)
writing that is venerated for the worship of a deity	writing that is venerated for the worship of a deity