 In the New Testament, there's only one word used to describe demon possession, and that's the word demonized. The definition of demonized literally means to be possessed by a demon. You can look this up for yourself under definition in Strong's Interlinear, as well as in a Greek-English lexicon of the New Testament and other early Christian literature. A common misconception is that the Bible doesn't use the term possession, but demonized means exactly that. This is why almost every Bible translation that you own uses the term demon possessed for the word demonized, because that's what it means. The word demonized is always a reference to possession, and there are no degrees of demonization, either you're demonized or you're not. Now, sometimes the word demonization is translated as under the power of a demon, but the phrase under the power of a demon is simply another way of saying demon possessed. They're synonymous. Demonized means to be possessed by a demon literally and in every instance that it's used.