13-letter words containing a, r, t, h, o, g
- orthodiagonal — the axis in a crystal
- orthognathous — straight-jawed; having the profile of the face vertical or nearly so; having a gnathic index below 98.
- orthogonalise — to make (vectors, functions, etc.) orthogonal.
- orthogonality — (mathematics, statistics) the property of being orthogonal.
- orthogonalize — to make (vectors, functions, etc.) orthogonal.
- orthographies — Plural form of orthography.
- orthographize — to spell correctly or according to the rules of orthography.
- ostreophagous — oyster-eating
- overbreathing — hyperventilation
- overnight bag — a travel bag large enough to hold personal articles and clothing for an overnight trip.
- phantasmagory — phantasmagoria.
- pharyngectomy — excision of part or all of the pharynx.
- phonautograph — a piece of equipment that records sound visually by detecting the sound waves and indicating them on a graph
- photo gallery — display of collected photographs
- photo-sharing — the publishing of digital photographs on the internet
- photoallergic — photosensitive.
- photographing — a picture produced by photography.
- phototelegram — a telegram that is sent by means of phototelegraphy
- phraseologist — a person who treats of or is concerned with phraseology.
- plain yoghurt — natural yoghurt, without added flavouring
- plethysmogram — the recording of a plethysmograph.
- pneumatograph — pneumograph.
- presto chango — change at once (usually used imperatively, as in a magician's command).
- pterylography — the description of the feather arrangement on birds
- reflectograph — a type of mechanical instrument used for communication with spirits or the dead
- right you are — If someone says 'right you are', they are agreeing to do something in a very willing and happy way.
- rotary plough — an implement with a series of blades mounted on a power-driven shaft, used to break up soil or weeds
- saratoga chip — potato chip.
- saurognathous — related to or resembling the Saurognathae family of birds that possess palate bones similar to those in saurians or lizards
- sharp-tongued — characterized by or given to harshness, bitterness, or sarcasm in speech.
- shooting star — meteor (def 1b).
- shopping cart — a four-wheeled cart provided by a supermarket or other retail store for a customer's use in collecting purchases.
- solar heating — to heat (a building) by means of solar energy.
- south georgia — a British island in the S Atlantic, about 800 miles (1290 km) SE of the Falkland Islands. About 1000 sq. mi. (2590 sq. km).
- spectrography — a spectroscope for photographing or producing a representation of a spectrum.
- staghorn fern — any of several epiphytic Old World ferns of the genus Platycerium, having broad, often antlerlike leaves and cultivated as a houseplant.
- steganography — the practice of concealing messages in such a way that only the sender and the recipient know that there is a message
- stereographer — a person who takes stereoscopic photographs.
- straightforth — straight or directly forward
- taphrogenesis — the process of forming rifts, resulting in regional faulting and subsidence
- thanatography — an account or story of a person's death experience
- the gas board — any company supplying gas as a source of domestic and industrial heat
- the high road — the principal road from one place to another
- the-godfather — a novel (1969) by Mario Puzo.
- thermostating — a device, including a relay actuated by thermal conduction or convection, that functions to establish and maintain a desired temperature automatically or signals a change in temperature for manual adjustment.
- thong leather — whang2 (def 2).
- thorough bass — figured bass.
- thoroughbrace — either of two strong leather straps upon which the body of certain types of carriage is supported
- thoroughpaced — trained to go through all the possible paces, as a horse.
- thremmatology — the science of breeding or propagating animals and plants under domestication.