| FELSPATHOID | • felspathoid n. Alternative form of feldspathoid. • felspathoid adj. Alternative form of feldspathoid. • FELSPATHOID n. any mineral of a group related to feldspar, also FELDSPATHOID, FOID. |
| FLASHPOINTS | • flashpoints n. Plural of flashpoint. • flash␣points n. Plural of flash point. • FLASHPOINT n. a critical moment beyond which a situation will inevitably erupt into violence. |
| FLOODLIGHTS | • floodlights n. Plural of floodlight. • floodlights v. Third-person singular simple present indicative form of floodlight. • FLOODLIGHT v. to illuminate by floodlighting. |
| FORTNIGHTLY | • fortnightly n. A publication issued fortnightly (once every two weeks). • fortnightly adj. Occurring once in a fortnight; once every two weeks. • fortnightly adv. Once in a fortnight; once every two weeks. |
| FOTHERGILLA | • Fothergilla prop.n. A taxonomic genus within the family Hamamelidaceae – witch alders. • FOTHERGILLA n. any plant of the Fothergilla genus of North American deciduous shrubs of the witch-hazel family. |
| FRITHSTOOLS | • frithstools n. Plural of frithstool. • frith␣stools n. Plural of frith stool. • FRITHSTOOL n. a seat in churches near the altar, to which offenders formerly fled for sanctuary. |
| LETHIFEROUS | • lethiferous adj. (Obsolete) Deadly, lethal. • LETHIFEROUS adj. causing death; carrying or bearing death. |
| OUTFLASHING | • outflashing v. Present participle of outflash. • OUTFLASH v. to flash more brightly. |
| OUTFLUSHING | • outflushing v. Present participle of outflush. • OUTFLUSH v. to flush more strongly. |
| OVERFLIGHTS | • overflights n. Plural of overflight. • OVERFLIGHT n. a passage over an area in an aircraft. |
| PILOTFISHES | • pilotfishes n. Plural of pilotfish. • pilot␣fishes n. Plural of pilot fish. • PILOTFISH n. a tropical fish. |
| SHOPLIFTERS | • shoplifters n. Plural of shoplifter. • SHOPLIFTER n. one who shoplifts. |
| SHOPLIFTING | • shoplifting n. (Uncountable) The action of stealing goods from a shop; the action of the verb shoplift. • shoplifting n. (Countable) A theft from a shop during trading hours. • shoplifting v. Present participle of shoplift. |
| THIOSULFATE | • thiosulfate n. (Chemistry) any salt or ester of thiosulfuric acid. • THIOSULFATE n. any salt of thiosulphuric acid, also THIOSULPHATE. |
| TRICHLORFON | • trichlorfon n. Metrifonate. • TRICHLORFON n. a crystalline compound used esp. as an insecticide, also TRICHLORPHON. |