Words starting with F that are validated

• fairy swallow — Noun – English ～ fancy domestic pigeon having blue-and-white plumage and heavily muffed feet
• fire-swallower — Noun – English ～ a performer who pretends to swallow fire
• free-swimming — Adjective – English ～ (of animals) able to swim about; not attached
• fencing sword — Noun – English ～ a sword used in the sport of fencing
• Ficus sycomorus — Noun – English ～ thick-branched wide-spreading tree of Africa and adjacent southwestern Asia often buttressed with branches rising from near the ground; produces cluster of edible but inferior figs on short leafless twigs; the biblical sycamore
• Fagus sylvatica purpurea — Noun – English ～ variety of European beech with shining purple or copper-colored leaves
• Fagus sylvatica — Noun – English ～ large European beech with minutely-toothed leaves; widely planted as an ornamental in North America
• Fagus sylvatica pendula — Noun – English ～ variety of European beech with pendulous limbs
• Fagus sylvatica atropunicea — Noun – English ～ variety of European beech with shining purple or copper-colored leaves
• Ficus carica sylvestris — Noun – English ～ wild variety of the common fig used to facilitate pollination of certain figs
• family Sylviidae — Noun – English ～ in some classifications considered a subfamily (Sylviinae) of the family Muscicapidae: Old World (true) warblers; American kinglets and gnatcatchers
• fissure of Sylvius — Noun – English ～ the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres
• family Symplocaceae — Noun – English ～ a dicotyledonous family of order Ebenales
• family Synchytriaceae — Noun – English ～ a fungus family of order Chytridiales
• Fallot's syndrome — Noun – English ～ a congenital heart defect producing cyanosis; characterized by four symptoms: pulmonary stenosis and ventricular septal defect and malposition of the aorta over both ventricles and hypertrophy of the right ventricle
• fetal alcohol syndrome — Noun – English ～ a congenital medical condition in which body deformation occurs or facial development or mental ability is impaired because the mother drinks alcohol during pregnancy
• family Syngnathidae — Noun – English ～ pipefishes
• family Synodontidae — Noun – English ～ soft-finned bottom-dwelling fishes
• Farm Credit System — Noun – English ～ a cooperative nationwide system of banks and associations providing credit to farmers and related businesses; originally capitalized by the federal government but now owned by its members and borrowers
• Federal Reserve System — Noun – English ～ the central bank of the United States; incorporates 12 Federal Reserve branch banks and all national banks and state-chartered commercial banks and some trust companies; "the Fed seeks to control the United States economy by raising and lowering short-term interest rates and the money supply"

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