The term 'EXTEND OVER' can be described by four crossword solutions: STRADDLE (8 letters), SPAN (4 letters), TRAVERSE (8 letters), and STRETCH (7 letters). To STRADDLE something is to sit or stand with one leg on either side of it. Spanning something means to cover or extend across it. Traversing something is to travel or pass over it. Lastly, stretching something is to draw out or expand it. All of these words describe the action of extending over something.