18-letter words containing n, o, r, f, u, l
- population figures — population totals; statistics relating to the size of populations
- presumption of law — a presumption based upon a policy of law or a general rule and not upon the facts or evidence in an individual case.
- return to the fold — come back home
- return-flue boiler — a fire-tube boiler having flues that collect the combustion gases at the end of the boiler opposite the fire door and pass them through the boiler to an uptake above the fire door.
- rule of engagement — a directive issued by a military authority controlling the use and degree of force, especially specifying circumstances and limitations for engaging in combat.
- safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
- self-instructional — pertaining to or constituting learning materials and conditions arranged so that students can proceed to learn on their own with little or no supervision.
- self-preoccupation — the state of being preoccupied.
- self-raising flour — flour with baking powder
- shrubby cinquefoil — a small shrub, Potentilla fruticosa, of the rose family, native to the Northern temperate region, having pinnate leaves and numerous, showy, bright-yellow flowers.
- silvery cinquefoil — any of several plants belonging to the genus Potentilla, of the rose family, having yellow, red, or white five-petaled flowers, as P. reptans (creeping cinquefoil) of the Old World, or P. argentea (silvery cinquefoil) of North America.
- soldier of fortune — a person who independently seeks pleasure, wealth, etc., through adventurous exploits.
- standoff insulator — a type of insulator that supports an electrical conductor at a distance from other elements or surfaces.
- stirling's formula — a relation that approximates the value of n factorial (n!), expressed as .
- sugarloaf mountain — a mountain in SE Brazil in Rio de Janeiro, at the entrance to Guanabara Bay. 1280 feet (390 meters).
- sunflower seed oil — the oil extracted from sunflower seeds, used as a salad oil, in the manufacture of margarine, etc
- turn in on oneself — to withdraw or cause to withdraw from contact with others and become preoccupied with one's own problems
- ultralow frequency — an electromagnetic wave with a frequency between 300 and 3000 hertz. Abbreviation: ULF, ulf.
- uriniferous tubule — a urine-bearing tubule in a nephron of a kidney.
- very low frequency — any frequency between 3 and 30 kilohertz. Abbreviation: VLF.
- weak nuclear force — weak interaction
- wrongful dismissal — the act of making someone redundant for reasons which are illegal or unjust
- xenon hexafluoride — a colorless, crystalline compound, XeF 6 , that melts at 50°C to a yellow liquid, and boils at 75°C.