wow, aren't you the enlightened little paragon of humanity
how about thinking for yourself as well and forming an opinion that is validated without resorting to clichés Jynx?
Why is it called the word of God? You can go ask the same thing to the Jews, since the Bible is half New and half Old Testament.
Anyway, why do they call it this? Since in the NT, they describe Jesus Christ. They recite his words and we believe Jesus to be the Son of God, part of the Trinity. However literaly or figurative you want to take this title.
We believe that God spoke through Jesus, when he told his parables.
So during a sermon if any part of the NT is read, afterwards the priest simply restates that he was simply quoting God to put it in a popular term. (Around here, he literally says "the words of God")