Yes, it is, merely by calling it the title that only Jesus merits does constitute idolatry.
A phrase can hold two meanings.
The Word was used as a Messianic title for Christ-as seen in the first chapter of John, but also refers to the actual words of God found in the Bible.
Another example of this is the title "Son of Man". It is a title for Christ the Messiah, but also used as a title for any human being (one born to another human).Clearly, a title doesn't need to be exclusive to one application.