| ARF | • arf interj. Representing the sound of a dog’s bark. • ARF n. Initialism of acute renal failure. • ARF n. (Electronics) Initialism of analog radio frequency. |
| ERF | • erf n. (Northern England, Scotland, rare) Inheritance; patrimony. • erf n. (By extension) Stock; cattle. • erf n. (US regional, Cape Colony, New York, South Africa) A small inherited house-and-garden lot in a village or settlement. |
| FAR | • far adj. Distant; remote in space. • far adj. Remote in time. • far adj. Long. (Can we add an example for this sense?) |
| FER | • fer prep. (Dialectal, especially Britain) Pronunciation spelling of for. • FER n. (Genetics) A gene responsible for encoding proto-oncogene tyrosine-protein kinase FER. • f***er n. Censored spelling of fucker. |
| FIR | • fir n. (Chiefly countable) A conifer of the genus Abies. • fir n. (Chiefly countable) Any pinaceous conifer of related genera, especially a Douglas fir (Pseudotsuga)… • fir n. (Uncountable) Wood of such trees. |
| FOR | • for conj. Because, as, since. • for prep. Towards; in the direction of. • for prep. Directed at; intended to belong to. |
| FRA | • fra n. A title of a friar or monk: brother. • fra adv. Archaic form of fro. • fra sym. (International standards) ISO 639-2/T & ISO 639-3 language code for French. |
| FRO | • fro adv. (Archaic) From; away; back or backward. • fro prep. (Obsolete) From. • fro n. (Slang) Clipping of afro (hairstyle). |
| FRY | • fry v. A method of cooking food. • fry v. To be affected by extreme heat or current. • fry n. (Usually in the plural, fries, chiefly Canada and US, cooking) A fried piece of cut potato. |
| FUR | • fur n. The hairy coat of various mammal species, especially when fine, soft and thick. • fur n. The hairy skin of an animal processed into clothing for humans. • fur n. A pelt used to make, trim or line clothing apparel. |
| ORF | • orf n. (Obsolete) Cattle. • orf n. (Medicine) An exanthemous disease caused by a parapox virus, occurring primarily in sheep and goats… • orf n. Alternative form of orfe (the fish). |
| REF | • ref n. (Informal) Clipping of referee. • ref n. Abbreviation of reference. • ref n. Abbreviation of refectory. |
| RIF | • rif v. Alternative letter-case form of RIF. • Rif prop.n. A mountainous region in northern Morocco. • Rif prop.n. A former country in North Africa, a republic which existed briefly during the 1920s in what is now northern Morocco. |