The phrase "across the sea" can be used to describe various situations and contexts. If you're looking for synonyms to express the same idea, you could use expressions like "over the ocean", "beyond the horizon", "across the water", "crossing the sea", "overseas", "transatlantic", "crossing the pond", and "beyond the waves". These phrases carry connotations of distance and vastness, conveying the idea of something that's far from home or out of reach. Whether you're talking about travel, communication, or relationships, "across the sea" and its synonyms evoke a sense of adventure, discovery, and possibility.