9-letter words containing o, s, i, p
- perotinus — ("Magnus Magister") fl. late 12th to early 13th century, French composer.
- perovskia — a member of the Perovskia genus of aromatic plant native to central Asia, esp Russian sage, Perovskia atriplicifolia
- persimmon — any of several trees of the genus Diospyros, especially D. virginiana, of North America, bearing astringent, plumlike fruit that is sweet and edible when ripe, and D. kaki, of Japan and China, bearing soft, red or orange fruit.
- personify — to attribute human nature or character to (an inanimate object or an abstraction), as in speech or writing.
- pertusion — the process or act of making a hole with a stabbing or penetrating implement
- pervasion — to become spread throughout all parts of: Spring pervaded the air.
- petronius — Gaius (ˈɡaɪəs), known as Petronius Arbiter. died 66 ad, Roman satirist, supposed author of the Satyricon, a picaresque account of the licentiousness of contemporary society
- petrosian — Tigran (tiɡˈran). 1929–84, Soviet chess player; world champion (1963–69)
- pettitoes — pig's trotters, esp when used as food
- phaseolin — a type of proteid that is present in the kidney bean
- phenolics — any of the class of thermosetting resins formed by the condensation of phenol, or of a phenol derivative, with an aldehyde, especially formaldehyde: used chiefly in the manufacture of paints and plastics and as adhesives for sandpaper and plywood.
- philhorse — the horse, in a group of horses that are used to pull a carriage etc, which is at the back and nearest the object being pulled
- phonemics — the study of phonemes and phonemic systems.
- phonetics — (in Chinese writing) a written element that represents a sound and is used in combination with a radical to form a character.
- phonetism — the science of speech sounds and of writing phonetically
- phonetist — a person who uses or advocates phonetic spelling.
- phoniness — not real or genuine; fake; counterfeit: a phony diamond.
- phosphide — a binary compound of phosphorus with a basic element or group.
- phosphine — a colorless, poisonous, ill-smelling, flammable gas, PH 3 .
- phosphite — (loosely) a salt of phosphorous acid.
- phosphori — plural of phosphorus
- photodisk — a disk for use in a computer that contains photographs or can have photographs stored on it in a digitally coded manner
- photonics — the study and technology of the use of light for the transmission of information.
- photopsia — a rare disease of the eye's retina that results in the perception of flashes of light
- phronesis — wisdom in determining ends and the means of attaining them.
- pianolist — a person who plays the Pianola
- pile shoe — an iron casting shaped to a point and fitted to a lower end of a wooden or concrete pile
- pilotfish — a small, marine fish, Naucrates ductor, often swimming with sharks.
- pilotless — lacking a pilot or needing no pilot: pilotless aircraft.
- pinaceous — belonging to the plant family Pinaceae.
- pinedrops — a slender, leafless, parasitic North American plant, Pterospora andromedea, having nodding white to red flowers, found growing under pines.
- piousness — having or showing a dutiful spirit of reverence for God or an earnest wish to fulfill religious obligations.
- pipestone — a reddish argillaceous stone used by North American Indians for making tobacco pipes.
- pirithoüs — a prince of the Lapiths, who accomplished many great deeds with his friend Theseus
- piroplasm — babesia.
- pisanello — Antonio [ahn-taw-nyaw] /ɑnˈtɔ nyɔ/ (Show IPA), (Antonio Pisano) 1397–1455? Italian painter and medalist.
- piscatory — of or relating to fishermen or fishing: a piscatory treaty.
- pisciform — shaped like a fish.
- piscivore — an animal that feeds on fish
- piss poor — of extremely inferior or disappointing quality or rating.
- piss-poor — of extremely inferior or disappointing quality or rating.
- pistachio — the nut of a Eurasian tree, Pistacia vera, of the cashew family, containing an edible, greenish kernel.
- pistoleer — a person, especially a soldier, who uses or is armed with a pistol.
- pistolero — a member of an armed band of roving mounted bandits.
- pistolier — a person, especially a soldier, who uses or is armed with a pistol.
- pistology — the branch of theology dealing with faith.
- pistorius — Oscar (Leonard Carl), born 1986, South African sprinter in races for below-the-knee amputees; winner of six Paralympic gold medals (2004–2012); found guilty of the murder of his girlfriend Reeva Steenkamp (1983–2013)
- pituitous — mucous.
- plainsong — the unisonous vocal music used in the Christian church from the earliest times.
- plasmodia — Biology. an ameboid, multinucleate mass or sheet of cytoplasm characteristic of some stages of organisms, as of myxomycetes or slime molds.