Camille, welcome to our forums.
As one not that well versed in the study of the Bible, I can't answer that. However, it is my belief that these words may not be used consistently, from one place to another in the Bible.
I appeal to some of our more theologically grounded members to address your question, and I'm sure that they will.
Peace and Love, Bruce Chris
"Christianity is not about what you believe, it is about how you treat other people; - with God's love"