Word vs religious writing

Word and religious writing both are nouns.

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

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

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

Word (noun)	religious writing (noun)
the sacred writings of the Christian religions	writing that is venerated for the worship of a deity
the divine word of God; the second person in the Trinity (incarnate in Jesus)