Holy Writ vs Holy Scripture

Holy Writ and Holy Scripture both are nouns.

Word	Noun	Adjective	Verb	Adverb
Holy Writ	Yes	No	No	No
Holy Scripture	Yes	No	No	No

As nouns, Holy Writ and Holy Scripture are synonyms defined as:

Holy Writ and Holy Scripture: the sacred writings of the Christian religions

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

Holy Writ (noun)	Holy Scripture (noun)
the sacred writings of the Christian religions	the sacred writings of the Christian religions