| FERRONICKEL | • ferronickel n. A ferroalloy of iron and nickel. • FERRONICKEL n. an alloy of iron and nickel.
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| FERRONICKELS | • FERRONICKEL n. an alloy of iron and nickel. | 
| FIELDWORKER | • fieldworker n. A person who does fieldwork. • FIELDWORKER n. one who works in the fields.
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| FIELDWORKERS | • fieldworkers n. Plural of fieldworker. • FIELDWORKER n. one who works in the fields.
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| FIGUREWORK | • figurework n. Decorative figures. • figurework n. Arithmetic; mathematics done with figures.
 • FIGUREWORK n. counting or calculation using numbers.
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| FIGUREWORKS | • FIGUREWORK n. counting or calculation using numbers. | 
| FIREWORK | • firework n. A device using gunpowder and other chemicals which, when lit, emits a combination of coloured flames… • FIREWORK n. a device which explodes with loud noise and colour.
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| FIREWORKS | • fireworks n. Plural of firework. • fireworks n. (Plural only) An event or a display where fireworks are set off.
 • fireworks n. (Plural only, figuratively) A boisterous or violent event or situation.
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| FORESKIRT | • foreskirt n. The front skirt of a garment, in distinction from the train. • FORESKIRT n. (Shakespeare) the front skirt of a garment, in distinction from the train.
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| FORESKIRTS | • foreskirts n. Plural of foreskirt. • FORESKIRT n. (Shakespeare) the front skirt of a garment, in distinction from the train.
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| FORETHINKER | • forethinker n. One who thinks ahead, or plans things in advance. • FORETHINKER n. one who forethinks.
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| FORETHINKERS | • forethinkers n. Plural of forethinker. • FORETHINKER n. one who forethinks.
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| FORKIER | • FORKY adj. resembling a fork. | 
| FORTRESSLIKE | • fortresslike adj. Resembling a fortress in shape or impregnability. • FORTRESSLIKE adj. like a fortress.
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| FROLICKER | • frolicker n. One who frolics; a reveler. • FROLICKER n. one who frolics.
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| FROLICKERS | • frolickers n. Plural of frolicker. • FROLICKER n. one who frolics.
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| FROLICKIER | • FROLICKY adj. frolicsome. |