"More across" basically means spreading out to a greater extent. There are several synonyms of the word "more across" such as expansive, widespread, extensive, far-reaching, reaching further, and spreading wider. Extensive implies large coverage or range while widespread means something that is spread or distributed over a large area. Far-reaching, on the other hand, suggests something that extends a long way or influences many people or things. Reaching further means something that stretches out or extends beyond a certain point. Finally, spreading wider indicates that something has stretched out to cover a greater area. All these words are great alternatives to describe the concept of "more across" in various contexts.