Ancient ships can have several synonyms, depending on the era and cultural context. Some of the most commonly used synonyms include antiquated vessels, archaic boats, historical galleys, traditional schooners, and classic sailing ships. Other possible synonyms could be medieval vessels, Renaissance gunboats, Viking longboats, or Greek triremes. Additionally, ancient ships can be referred to as old-time crafts, traditional watercraft, or historic maritime vessels. The use of specific synonyms can bring a historic or cultural nuance to the description of an ancient ship and enhance the reader's understanding of its origin and purpose.