| ALDERFLIES | • alderflies n. Plural of alderfly. • ALDERFLY n. a riverside winged insect. |
| ALFILERIAS | • ALFILERIA n. (Spanish) a Californian weed, aka pin grass, also ALFILARIA. |
| CALCIFEROL | • calciferol n. Vitamin D3 (C27H44O). • CALCIFEROL n. vitamin D2. |
| FERNALLIES | • FERNALLY n. a vascular flowerless plant, a pteridophyte, other than a fern. |
| FIBRILLATE | • fibrillate v. (Intransitive) To make rapid irregular movements. • FIBRILLATE v. to undergo fibrillation. |
| FILLAGREED | • FILLAGREE v. to execute this lacework, also FILAGREE, FILIGRAIN, FILIGRANE, FILIGREE. |
| FILLAGREES | • fillagrees n. Plural of fillagree. • FILLAGREE n. a kind of ornamental metallic lacework. |
| FILTERABLE | • filterable adj. Able to be separated by filtration. • filterable adj. That can pass through a specified filter. • FILTERABLE adj. capable of being filtered, also FILTRABLE. |
| FIREBALLER | • fireballer n. (Baseball) A pitcher who throws very fast balls. • FIREBALLER n. a baseball pitcher known for throwing fastballs. |
| FIREWALLED | • firewalled v. Simple past tense and past participle of firewall. • FIREWALL v. to install software that protects a network against unauthorized users. |
| FLATLINERS | • flatliners n. Plural of flatliner. • FLATLINER n. one who flatlines. |
| FLORILEGIA | • florilegia n. Plural of florilegium. • FLORILEGIUM n. (Latin) a collection of literary pieces; an anthology. |
| FRAXINELLA | • fraxinella n. A fragrant herb in the rue family, Dictamnus albus. • FRAXINELLA n. a perennial herb of the rue family. |
| INFERNALLY | • infernally adv. In an infernal manner. • INFERNAL adv. pertaining to hell. |
| MALLEIFORM | • malleiform adj. Hammer-shaped. • MALLEIFORM adj. shaped like a hammer. |
| PAINFULLER | • painfuller adj. Comparative form of painful: more painful. • PAINFUL adj. causing pain. |
| PILFERABLE | • pilferable adj. That can be pilfered. • PILFERABLE adj. that can be pilfered. |
| PREFIXALLY | • prefixally adv. In a prefixal manner. • PREFIXAL adv. pertaining to a prefix. |
| REFILLABLE | • refillable adj. Capable of being filled again. • refillable n. Any product that can be refilled. • REFILLABLE adj. that can be refilled. |
| WEARIFULLY | • wearifully adv. In a weariful manner. • WEARIFUL adv. wearisome. |