A steamship line is a company that operates a fleet of steam-powered ships for commercial transport of goods and passengers. However, there are several synonyms for this term, such as shipping line, ocean liner, maritime carrier, and cruise line. A shipping line refers to a company involved in the transportation of cargo by sea, while an ocean liner is a large passenger ship that operates on a regular schedule and is designed for ocean voyages. A maritime carrier refers to a company that provides comprehensive logistics and transportation services, including shipping by sea. Finally, a cruise line is a company that operates ships for leisure travel and offers a variety of onboard activities and amenities.