Commercial ships are vessels that are used for commercial purposes, such as transporting cargo or passengers. There are several synonyms for the term "commercial ships" that are commonly used in the shipping industry. Some of these include "merchant vessels" which refers to ships that are used for trading goods and "cargo ships" which are specifically designed to transport goods. Other synonyms include "freight carriers" which refers to ships that transport freight and "tankers" which are specialized vessels designed to carry liquids or gases. Additionally, there are passenger ships such as "cruise liners" and "ferries" which are also considered commercial ships.