| FARNESOLS | • farnesols n. Plural of farnesol. • FARNESOL n. (Italian) an alcohol found in various essential oils and used in perfumery. |
| FAVORLESS | • favorless adj. Alternative form of favourless. • FAVORLESS adj. (US) without favor, also FAVOURLESS. |
| FLOORLESS | • floorless adj. Lacking a floor. • FLOORLESS adj. without a floor. |
| FLOURLESS | • flourless adj. Without flour; made without the use of flour. • FLOURLESS adj. without flour. |
| FLUOROSES | • fluoroses n. Plural of fluorosis. • FLUOROSIS n. an abnormal condition due to excess fluoride, involving mottling of the teeth. |
| FORCELESS | • forceless adj. Without force. • FORCELESS adj. having little or no force. |
| FORESAILS | • foresails n. Plural of foresail. • FORESAIL n. the lowest sail set on the foremast of a square-rigged ship. |
| FORESLOWS | • foreslows v. Third-person singular simple present indicative form of foreslow. • FORESLOW v. (Shakespeare) to delay, put off, also FORSLOW, FORSLOE. |
| FROCKLESS | • frockless adj. Without a frock. • FROCKLESS adj. destitute of a frock. |
| FRONDLESS | • frondless adj. Without fronds. • FRONDLESS adj. without fronds. |
| FRONTLESS | • frontless adj. Lacking a front. • frontless adj. Shameless, impudent. • FRONTLESS adj. shameless, brazen. |
| FROSTLESS | • frostless adj. Without frost. • FROSTLESS adj. without frost. |
| FROTHLESS | • frothless adj. Without froth. • FROTHLESS adj. without froth. |
| FUSAROLES | • fusaroles n. Plural of fusarole. • FUSAROLE n. (French) a semicircular moulding around a column, also FUSAROL. |
| PROOFLESS | • proofless adj. Without proof. • PROOFLESS adj. wanting sufficient evidence to induce belief; not proved. |
| SEAFLOORS | • seafloors n. Plural of seafloor. • SEAFLOOR n. the bottom of the sea. |