"That-a-way" is an informal expression commonly used to indicate a direction or location. It can be replaced with synonyms such as "over there," "that direction," or "in that vicinity." Alternatively, you could use more specific terms to convey the intended direction, such as "north," "southwest," or "towards the mountains." If you want to add emphasis or urgency to your direction, you can use phrases like "right there," "just there," or "up ahead." Ultimately, the choice depends on the context and what you want to communicate. Using a variety of synonyms can also add color and nuance to your speech or writing.