13-letter words containing o, r, t, h, g
- matchboarding — a construction of matchboards.
- megawatt hour — a unit of energy equal to the work done by a power of a million watts in one hour
- merrythoughts — Plural form of merrythought.
- metallography — the study of the structure of metals and alloys by means of microscopy.
- methoxy group — the univalent group CH 3 O−.
- microlighting — the sport or act of flying in microlights
- microteaching — a scaled-down teaching procedure with a few students under controlled conditions, often videotaped in order to analyze teaching techniques and develop new teaching skills.
- morning watch — the watch from 4 a.m. until 8 a.m.
- morphogenetic — the development of structural features of an organism or part.
- mother figure — a woman embodying or seeming to embody the qualities of an idealized conception of the female parent, eliciting from others the emotional responses that a child typically has toward its mother.
- mother of god — a title of the Virgin Mary.
- mother tongue — the language first learned by a person; native language.
- motherfucking — a mean, despicable, or vicious person.
- mouthwatering — very appetizing in appearance, aroma, or description: a mouth-watering dessert.
- mythographies — Plural form of mythography.
- nanofortnight — (jargon) (Adelaide University) 10^-9 fortnights or about 1.2 milliseconds. This unit was used largely by students doing undergraduate practicals. See microfortnight, attoparsec, and micro-.
- neuroethology — the study of the role of the nervous system in animal behaviour
- night journey — the journey in which Muhammad was carried from Mecca to Jerusalem and ascended into heaven.
- night terrors — a sudden feeling of extreme fear that awakens a sleeping person, usually during slow-wave sleep, and is not associated with a dream or nightmare.
- night-terrors — a sudden feeling of extreme fear that awakens a sleeping person, usually during slow-wave sleep, and is not associated with a dream or nightmare.
- north augusta — a city in W South Carolina.
- north chicago — a city in NE Illinois, on Lake Michigan.
- north reading — a city in NE Massachusetts.
- north sea gas — natural gas extracted from deposits beneath the North Sea
- opisthography — the practice of writing on the front and back of a parchment or papyrus
- orchestrating — Present participle of orchestrate.
- orchidologist — someone who is knowledgeable in orchidology
- organ whistle — a steam or air whistle in which the jet is forced up against the thin edge of a pipe closed at the top.
- organolithium — (organic chemistry) Describing any organic compound containing a carbon to lithium bond.
- organotherapy — the branch of therapeutics that deals with the use of remedies prepared from the organs of animals, as from the thyroid gland, the pancreas, or the suprarenal bodies.
- ornithologist — the branch of zoology that deals with birds.
- 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.
- orthohydrogen — the form of molecular hydrogen in which the nuclei of the two hydrogen atoms contained in the molecule have spins in the same direction.
- ostreophagous — oyster-eating
- outside-right — a footballer who plays on the outside right wing of the field
- outstretching — Present participle of outstretch.
- 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.