11-letter words containing p, o, i, r
- septentrion — Obsolete. the north.
- septiferous — in possession of a septum or partition
- serial port — A serial port on a computer is a place where you can connect the computer to a device such as a modem or a mouse.
- serpiginous — (formerly) a creeping or spreading skin disease, as ringworm.
- ship of war — warship.
- ship-broker — a person who acts for a shipowner by getting cargo and passengers for his ships and also handling insurance and other matters
- sialography — radiography of salivary glands once they have been injected with a contrast medium
- sideropenia — a lack of iron in the body
- siderophile — (of a cell or tissue) having an affinity for iron.
- sideroscope — an apparatus for detecting splinters of iron or steel in the eye.
- silverpoint — a technique of drawing with a silver stylus on specially prepared paper.
- simon peter — Peter (def 1).
- singaporean — an island on the Strait of Singapore, off the S tip of the Malay Peninsula.
- six-pointer — a football match between two teams in similar positions in the league table, considered as being worth six points as it not only gains the winning team three points but denies three points to the losing team
- slipperwort — any of several tropical American plants belonging to the genus Calceolaria, of the figwort family, having opposite or whorled leaves and slipper-shaped flowers.
- sniperscope — a snooperscope designed for attaching to a rifle or carbine.
- soap boiler — a manufacturer of soap
- sociography — the branch of sociology that uses statistical data to describe social phenomena.
- soldiership — a person who serves in an army; a person engaged in military service.
- sophistries — Sophistries are clever arguments that sound convincing but are in fact false.
- soroptimist — a member of an international association of professional or executive businesswomen (Soroptimist Club) devoted primarily to welfare work.
- spermatoxic — (of a substance) toxic to spermatozoa.
- spermatoxin — a substance toxic to spermatozoa.
- spermophile — any of various burrowing rodents of the squirrel family, especially of the genus Spermophilus (or Citellus), sometimes sufficiently numerous to do much damage to crops, as the ground squirrels and susliks.
- spermotoxic — (of a substance) toxic to spermatozoa.
- spermotoxin — a substance toxic to spermatozoa.
- spheroidize — to turn or be turned into spheroids
- spice route — an ancient trade route followed by merchants, importers and exporters trading in exotic spices such as cloves and cinnamon
- spider hole — a foxhole with a camouflaged lid or cover in which a sniper hides
- spin bowler — a bowler who specializes in bowling balls with a spinning motion
- spin doctor — Slang. a press agent skilled at spin control.
- spinal cord — the cord of nerve tissue extending through the spinal canal of the spinal column.
- spiniferous — (esp of plants) bearing spines or thorns
- spinsterdom — the state of being a spinster
- spiraliform — having or resembling spiral lines
- spiriferous — having a spire or spiral parts.
- spirillosis — a bacterial disease
- spirochaete — any of various spiral-shaped motile bacteria of the family Spirochaetaceae, certain species, as Treponema, Leptospira, and Borrelia, being pathogenic to humans and other animals, and other species being free-living, saprophytic, or parasitic.
- spirography — the study of breathing using a spirograph
- spiroplasma — any of numerous bacteria of the genus Spiroplasma that have no cell walls or flagella and are parasitic in plants and arthropods.
- sponge iron — finely divided, porous iron, reduced from an oxide at a temperature below the melting point.
- sponsorship — a person who vouches or is responsible for a person or thing.
- sporadicity — (of similar things or occurrences) appearing or happening at irregular intervals in time; occasional: sporadic renewals of enthusiasm.
- spore fruit — a spore-bearing structure, as an ascoscarp; sporocarp.
- spore print — the pattern produced by placing the cap of a mushroom on a piece of paper and allowing the spores to fall
- sporiferous — bearing spores.
- sporocystic — of or like a sporocyst
- sporogonium — the sporangium of mosses and liverworts.
- sport shirt — a long- or short-sleeved soft shirt for informal wear by men, having a squared-off shirttail that may be left outside the trousers, usually worn without a tie.
- sporulation — to produce spores.