Book vs Holy Scripture

Book and Holy Scripture both are nouns.

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

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

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

Book (noun)	Holy Scripture (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