Fair, Fair up To smooth out, to even a knot, splice or sinnet. (3)

Fake  (a) One circle of a coil of rope (1) (b) A circle or coil of rope in which the coils overlap and the rope is free for running.(6) (c) To Fake Coil down a rope (6) See Flake

Fancy Knot, Fancy Work Any decorative or trick knot, even one that serves a practical purpose. (3)

Fast Attached or secured (to) (6)

Fender A specially made buffer to hang between two vessels, or vessel and wharf. (1)

Fibre  The smallest element in cordage. (5)

Fid Piece of wood similar to a Marlin Spike (2)

Filament A fine thread drawn from molten plastic. i.e. the fibres in synthetic ropes (8)

Flake  Alternate to Fake

Flat Seizing  Seizing that has no riding turns (3)

Follow the lead In Turks Heads and other knots, to parallel alongside the first-laid strand with identical over-and-under. (3)

Foul  A rope which cannot slide because it is tangled or caught.(4)

Foxes Two yarns hand twisted ((6)

Frapping, Frapping Turn Turns taken round a lashing or seizing at right angles, to tighten it.(5)

Fray, Frayed Describes the unraveling, especially of the end, of a rope.