Studying the Word of God
Wayne Grudem is very helpful in his Systematic Theology on what we mean when we refer to "the word of God".
He points out on pages 47-48 that "the word of God" can refer, in Scripture, to the Son of God, Jesus Christ. It can also refer to God's speech in 4 forms: 1. His decrees; 2. His words of personal address; 3. His speech through human lips, and 4. His words in written form, for us the Bible.