When describing being on a ship, there are various synonyms to use instead of the phrase "aboard ship." Some alternative phrases to use are "on board," "on the vessel," "at sea," "on the high seas," or "on the boat." Each of these phrases give readers a clear understanding that a person or object is currently on a ship. These synonyms are useful for writers to avoid repetition and provide a more diverse vocabulary in their writing. By incorporating synonyms for "aboard ship," writers can not only add more variation to their writing but also create a more vivid and engaging description for their readers.