Full Gospel is more than a synonym for Pentecostal. In the New Testament, the Apostle Paul is Pentecostal and he said “I have ‘fully preached’ the Gospel to you for three years. I am clean and innocent from the blood of every person”. (Minister Clark’s paraphrase). He preached MUCH more than the Baptism in the Holy Spirit!
*** Christians who are ‘Full Gospel’ seek to continuously lay down personal biases, prejudices, and opinions about the Bible, so they can ever receive what JESUS is saying to the churches — not the ideas man clings to for his/her own preferences.