Find the odd number / letters / word from the given alternative.

The odd word from the given options is “quay”. A quay is a wharf or pier, while the other words are all parts of a ship.

• A deck is the main horizontal surface of a ship, on which the crew and passengers live and work.
• The stem is the front part of a ship, while the bow is the front part of the ship above the waterline.
• The mast is a tall pole that supports the sails of a ship.

A quay is not a part of a ship, but rather a structure that is built alongside a body of water to provide a place for ships to dock.