Holy Scripture vs Word of God

Holy Scripture and Word of God both are nouns.

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

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

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

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

Holy Scripture (noun)	Word of God (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