Holy Scripture vs Book

Holy Scripture and Book both are nouns.

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

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

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

Holy Scripture (noun)	Book (noun)
the sacred writings of the Christian religions	the sacred writings of the Christian religions
	the sacred writings of Islam revealed by God to the prophet Muhammad during his life at Mecca and Medina