Word of God vs Holy Scripture

Word of God and Holy Scripture both are nouns.

Word	Noun	Adjective	Verb	Adverb
Word of God	Yes	No	No	No
Holy Scripture	Yes	No	No	No

As nouns, Word of God and Holy Scripture are synonyms defined as:

Word of God and Holy Scripture: the sacred writings of the Christian religions

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

Word of God (noun)	Holy Scripture (noun)
the sacred writings of the Christian religions	the sacred writings of the Christian religions
the message of the Gospel of Christ
a manifestation of the mind and will of God