The difference between Foretop and Mast

Foretop as a noun (obsolete):

The top of the head; the top of the forehead.

Foretop as a noun (obsolete):

The lock of hair which grows on top of the forehead; the corresponding part of a wig.

Foretop as a noun (obsolete):

In the phrase, to take time (or occasion or opportunity) by the foretop, meaning "to boldly seize an opportunity".

Foretop as a noun (obsolete):

A fop; one who sports a foretop.

Foretop as a noun (UK, _, dialectal):

An erect tuft of hair.

Foretop as a noun:

The forelock of a horse.

Foretop as a noun (nautical):

A platform at the top of the foremast, supported by the trestle trees.

Foretop as a noun:

The front seat at the top of a horse-drawn vehicle.

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.

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.

Mast as a verb:

To supply and fit a mast to a ship

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.

Mast as a verb (of swine and other animals):

To feed on forest seed or fruit.

Mast as a verb (agriculture, forestry, ecology, of a population of plants):

To vary fruit and seed production in multi-year cycles.