Gallon vs. Galleon — What's the Difference?

The gallon is a unit of volume in imperial units and United States customary units. Three different versions are in current use: the imperial gallon (imp gal), defined as 4.546 09 litres, which is used in the United Kingdom, Canada, and some Caribbean countries; the US gallon (US gal) defined as 231 cubic inches (exactly 3.785 411 784 litres), which is used in the US and some Latin American and Caribbean countries; and the US dry gallon ("usdrygal"), defined as 1/8 US bushel (exactly 4.404 883 770 86 litres).There are four quarts in a gallon and eight pints in a gallon, which have different volumes in different systems.

Galleons were large, multi-decked sailing ships first used as armed cargo carriers by European states from the 16th to 18th centuries during the age of sail and were the principal vessels drafted for use as warships until the Anglo-Dutch Wars of the mid-1600s. Galleons generally carried three or more masts with a lateen fore-and-aft rig on the rear masts, were carvel built with a prominent squared off raised stern, and used square-rigged sail plans on their fore-mast and main-masts.

A unit of volume in the US Customary System, used in liquid measure, equal to 4 quarts (3.785 liters).

A sailing ship in use (especially by Spain) from the 15th to the 18th centuries, originally as a warship, later for trade. Galleons were typically square-rigged and had three or more decks and masts

A unit of volume in the British Imperial System, used in liquid and dry measure, equal to 4 quarts (4.546 liters). See Table at measurement.

A large three-masted sailing ship with a square rig and usually two or more decks, used in the 1500s, 1600s, and 1700s, especially by Spain as a merchant ship or warship.

A container with a capacity of one gallon.

A large, three masted, square rigged sailing ship with at least two decks.

The contents of such a container.

A sailing vessel of the 15th and following centuries, often having three or four decks, and used for war or commerce. The term is often rather indiscriminately applied to any large sailing vessel.

A unit of volume, equivalent to eight pints

A large square-rigged sailing ship with three or more masts; used by the Spanish for commerce and war from the 15th to 18th centuries

Exactly 4.54609 liters; an imperial gallon

(US) 231 cubic inches or approximately 3.785 liters for liquids (a "U.S. liquid gallon")

(US) one-eighth of a U.S. bushel or approximately 4.405 liters for dry goods (a "U.S. dry gallon").

A large quantity (of any liquid).

A measure of capacity, containing four quarts; - used, for the most part, in liquid measure, but sometimes in dry measure.

United States liquid unit equal to 4 quarts or 3.785 liters

A British imperial capacity measure (liquid or dry) equal to 4 quarts or 4.545 liters