16-letter words containing f, e, r, u, l, d
- sutherland falls — a waterfall in New Zealand, on SW South Island. 1904 feet (580 meters) high.
- tierra del fuego — a group of islands at the S tip of South America, separated from the mainland by the Strait of Magellan: jointly owned by Argentina and Chile; boundary disputed. 27,476 sq. mi. (71,165 sq. km).
- twofold purchase — a purchase using a double standing block and a double running block so as to give a mechanical advantage of four or five, neglecting friction, depending on whether the hauling is on the standing block or the running block.
- undifferentiable — capable of being differentiated.
- vulcanized fiber — a leatherlike substance made by compression of layers of paper or cloth that have been treated with acids or zinc chloride, used chiefly for electric insulation.