15-letter words containing o, r, t, h, s, i
- morphosyntactic — involving both morphology and syntax.
- mother superior — the head of a Christian religious community for women.
- motoring school — an organization that provides driving lessons
- mount suribachi — a volcanic hill in the Volcano Islands, on Iwo Jima: site of a US victory (1945) over the Japanese in World War II
- muslim brothers — an organization founded in Egypt in 1928 by Hasan al-Banna (1906–49), calling for a return to rigid orthodoxy, the overthrow of secular governments, and a restoration of the theocratic state.
- nasopharyngitis — (medicine) An inflammation of the nasal passages, and of the upper pharynx.
- natural history — the sciences, as botany, mineralogy, or zoology, dealing with the study of all objects in nature: used especially in reference to the beginnings of these sciences in former times.
- neighbor states — the states or countries next to another state or country
- neo-lutheranism — a movement begun in the 19th century in Germany and Scandinavia to revive the orthodox principles, beliefs, and practices of the Lutheran Church.
- nephrolithiasis — (pathology) presence of calculi in kidneys.
- neuroprosthesis — A prosthesis used to improve the function of an impaired nervous system.
- neuropsychiatry — the branch of medicine dealing with diseases involving the mind and nervous system.
- non-charismatic — of, having, or characteristic of charisma.
- noncatastrophic — of the nature of a catastrophe, or disastrous event; calamitous: a catastrophic failure of the dam.
- nonpartisanship — The quality of not being partisan, of remaining politically independent.
- nonpsychiatrist — a person who is not a psychiatrist
- north australia — a former division of Australia; now part of the Northern Territory.
- north caucasian — a language family including all the Caucasian languages north of the Caucasian divide, as Kabardian and the Circassian language proper, and a few between the divide and the Black Sea, as Abkhazian.
- north highlands — a town in central California, near Sacramento.
- north kingstown — a town in S central Rhode Island.
- north yorkshire — a county in NE England. 3208 sq. mi. (8309 sq. km).
- northern lights — aurora borealis.
- nothingarianism — Beliefs and practices of a nothingarian.
- nottinghamshire — a county in central England. 854 sq. mi. (2210 sq. km).
- nyquist theorem — (communications) A theorem stating that when an analogue waveform is digitised, only the frequencies in the waveform below half the sampling frequency will be recorded. In order to reconstruct (interpolate) a signal from a sequence of samples, sufficient samples must be recorded to capture the peaks and troughs of the original waveform. If a waveform is sampled at less than twice its frequency the reconstructed waveform will effectively contribute only noise. This phenomenon is called "aliasing" (the high frequencies are "under an alias"). This is why the best digital audio is sampled at 44,000 Hz - twice the average upper limit of human hearing. The Nyquist Theorem is not specific to digitised signals (represented by discrete amplitude levels) but applies to any sampled signal (represented by discrete time values), not just sound.
- on a shoestring — If you do something or make something on a shoestring, you do it using very little money.
- on short notice — with little warning
- on the increase — growing, increasing
- onychocryptosis — a form of nail disease in which nails are ingrown
- orchestrational — Of or pertaining to orchestration.
- ornithorhynchus — the platypus.
- orthophosphoric — (chemistry) Describing the ordinary form of phosphoric acid and its derivatives.
- orthopsychiatry — an approach to psychiatry concerned with the study and treatment of behavioral disorders, especially of young people.
- osteochondritis — inflammation of bone and cartilage.
- osteochondrosis — a disease of bone and cartilage growth centers in children that begins as a necrosis and is followed by regeneration or renewed calcification.
- outdoorsmanship — a person devoted to outdoor sports and recreational activities, as hiking, hunting, fishing, or camping.
- over-enthusiasm — absorbing or controlling possession of the mind by any interest or pursuit; lively interest: He shows marked enthusiasm for his studies.
- oyster toadfish — See under toadfish (def 1).
- panoramic sight — an artillery sight that can be rotated horizontally in a full circle.
- parthenogenesis — development of an egg without fertilization.
- pepin the short — ("Pepin the Short") died a.d. 768, king of the Franks 751–768 (father of Charlemagne).
- phosphocreatine — a compound, C 4 H 1 0 O 5 N 3 P, found chiefly in muscle, formed by the enzymatic interaction of an organic phosphate and creatine, the breakdown of which provides energy for muscle contraction.
- phosphorylation — to introduce the phosphoryl group into (an organic compound).
- phosphorylative — of or relating to phosphorylation
- photojournalism — journalism in which photography dominates written copy, as in certain magazines.
- photomicroscope — a microscope having an illuminator and a camera mechanism for producing a photomicrograph.
- photosensitizer — a drug, food, or other chemical that increases sensitivity to light and other visible photons
- phototransistor — a transistor that amplifies current induced by photoconductivity.
- physiotherapist — physical therapy.
- pink-shirt book — (publication) "The Peter Norton Programmer's Guide to the IBM PC". The original cover featured a picture of Peter Norton with a silly smirk on his face, wearing a pink shirt. Perhaps in recognition of this usage, the current edition has a different picture of Norton wearing a pink shirt. See also book titles.