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An ocean liner.
It has the most mass.
An ocean greyhound is a cruise ship or passenger ship.
Synonyms for ocean greyhound are: floating hotel, floating palace, liner, luxury liner, ocean liner, passenger steamer
the ocean liner was in the cool blue sea.
"liner"Source: True Knowledge
Ocean liner? Truck/SUV cargo liner? Pond liner? Trash liner? Chimney liner? Pool liner? Helmet liner? Panty liner? Dirty one-liner?