anyway, I have yet to see a verse of the Bible that makes use of one term that I could not switch and use the other term and the sentence did not still work juts fine.


I think at best the difference in the two terms is just about highlighting one thing in a sentence.

There are 3 words that seem to be used all the time to discribe the invisible world.
#1 - Spirit
#2 - Soul
#3 - Ghost


I think that the most historical meanings of the words come from other words that are talking about the breath , or the 'wind'

Wind is a lot like our breath...you can't see it, but it is real because you can feel it's effect.
You know the wind is ****ing because you can see the trees move, you can tell someone is alive because you can see their chest move when they breath.

But you cant see where the wind came from, nor where it goes.



So its very easy why such ideas were used by the writers of the bible when they had to try to describe the invisible world....or about God.