The difference between Mast and Topmast
When used as nouns, mast means a tall, slim post or tower, usually tapering upward, used to support, for example, the sails on a ship, flags, floodlights, or communications equipment such as an aerial, usually supported by guy-wires, whereas topmast means the highest mast in a fore-and-aft-rigged ship.
Mast is also verb with the meaning: to supply and fit a mast to a ship.
check bellow for the other definitions of Mast and Topmast
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Mast as a noun:
A tall, slim post or tower, usually tapering upward, used to support, for example, the sails on a ship, flags, floodlights, or communications equipment such as an aerial, usually supported by guy-wires.
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Mast as a noun (naval):
A non-judicial punishment ("NJP") disciplinary hearing under which a commanding officer studies and disposes of cases involving those under his command.
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Mast as a verb:
To supply and fit a mast to a ship
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Mast as a noun:
The fruit of forest-trees (beech, oak, chestnut, pecan, etc.), especially if having fallen from the tree, used as fodder for pigs and other animals.
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Mast as a verb (of swine and other animals):
To feed on forest seed or fruit.
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Mast as a verb (agriculture, forestry, ecology, of a population of plants):
To vary fruit and seed production in multi-year cycles.
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Topmast as a noun (nautical):
The highest mast in a fore-and-aft-rigged ship.
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Topmast as a noun (nautical):
The mast below the topgallant mast in a square-rigged ship.