Between
Part of speech: preposition
Definition: In the position or interval that separates (two things), or intermediate in quantity or degree. (See the Usage notes below.) Shared in confidence. In transit from (one to the other, or connecting places). Combined (by effort or ownership). One of (representing a choice).
Middle
Part of speech: noun
Definition: A centre, midpointThe part between the beginning and the end.the middle stumpThe central part of a human body.
Part of speech: adjective
Definition: Being in the middle or in-between; as middle point, middle name, Middle English, Middle Ages, middle weight, etc.Central to.