15-letter words containing n, o, h, a
- thorndike's law — the principle that all learnt behaviour is regulated by rewards and punishments, proposed by Edward Lee Thorndike (1874–1949), US psychologist
- thought pattern — habitual way of thinking
- thought reading — mind reading.
- thousand island — of or relating to the Thousand Islands or their inhabitants
- thraco-phrygian — a hypothetical branch of Indo-European implying a special genetic affinity between the meagerly attested Thracian and Phrygian languages.
- three of a kind — a set of three cards of the same denomination.
- thyrocalcitonin — calcitonin
- tie one's hands — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
- to change hands — When something changes hands, its ownership changes, usually because it is sold to someone else.
- to err is human — If you say that to err is human, you mean that it is natural for human beings to make mistakes.
- to pack a punch — If something packs a punch, it has a very powerful effect.
- to the contrary — opposite in nature or character; diametrically or mutually opposed: contrary to fact; contrary propositions.
- tomato hornworm — the larva of a hawk moth, Manduca quinquemaculata, having a black, hornlike structure at the rear, that feeds on the leaves of tomato, potato, and other plants of the nightshade family.
- toughened glass — glass that has been made stronger using chemical or thermal treatments so that it will not break easily
- towers of hanoi — (games) A classic computer science problem, invented by Edouard Lucas in 1883, often used as an example of recursion. "In the great temple at Benares, says he, beneath the dome which marks the centre of the world, rests a brass plate in which are fixed three diamond needles, each a cubit high and as thick as the body of a bee. On one of these needles, at the creation, God placed sixty-four discs of pure gold, the largest disc resting on the brass plate, and the others getting smaller and smaller up to the top one. This is the Tower of Bramah. Day and night unceasingly the priests transfer the discs from one diamond needle to another according to the fixed and immutable laws of Bramah, which require that the priest on duty must not move more than one disc at a time and that he must place this disc on a needle so that there is no smaller disc below it. When the sixty-four discs shall have been thus transferred from the needle on which at the creation God placed them to one of the other needles, tower, temple, and Brahmins alike will crumble into dust, and with a thunderclap the world will vanish." The recursive solution is: Solve for n-1 discs recursively, then move the remaining largest disc to the free needle. Note that there is also a non-recursive solution: On odd-numbered moves, move the smallest sized disk clockwise. On even-numbered moves, make the single other move which is possible.
- training school — a school that provides training in some art, profession, or vocation.
- trainspotterish — obsessed with trivial details, esp of a subject generally considered uninteresting
- transhistorical — occurring throughout all human history
- tribromoethanol — a white, crystalline powder, C 2 H 3 Br 3 O, used as a basal anesthetic.
- trichloroethane — a volatile nonflammable colourless liquid with low toxicity used for cleaning electrical apparatus and as a solvent; 1,2,3-trichloroethane. Formula: CH3CCl3
- trichomonacidal — relating to a trichomonacide
- trithionic acid — a thionic acid, H2S3O6
- trochlear nerve — either one of the fourth pair of cranial nerves, consisting of motor fibers that innervate the superior oblique muscle of the upper part of the eyeball.
- trout fisherman — a fisherman who catches trout
- ultramarathoner — a person who takes part in an ultramarathon
- ultrasonography — a diagnostic imaging technique utilizing reflected high-frequency sound waves to delineate, measure, or examine internal body structures or organs.
- unauthoritative — having due authority; having the sanction or weight of authority: an authoritative opinion.
- unchoreographed — not choreographed; not pre-arranged or pre-prepared; unplanned
- unchronological — arranged in the order of time: a chronological list of events.
- uncopyrightable — not able to be copyrighted
- under one's hat — a shaped covering for the head, usually with a crown and brim, especially for wear outdoors.
- unphilosophical — not adhering to philosophical theory or principles
- unseaworthiness — constructed, outfitted, manned, and in all respects fitted for a voyage at sea.
- unsophisticated — not sophisticated; simple; artless.
- vanishing point — a point of disappearance, cessation, or extinction: His patience had reached the vanishing point.
- venetian school — any of various groups of artists identified with Venice throughout the history of Italian art but most notably the painters of the 18th century, as Giovanni Battista Tiepolo, Francesco Guardi, and Antonio Canaletto.
- venus hairstone — a variety of rutilated quartz, used as a gemstone.
- vice chancellor — a substitute, deputy, or subordinate chancellor.
- vice-chancellor — a substitute, deputy, or subordinate chancellor.
- vine phylloxera — a homopterous insect, Phylloxera vitifolia, typically feeding on vine juices
- w.h. richardson — Henry Handel (Henrietta Richardson Robertson) 1870–1946, Australian novelist.
- walking holiday — a holiday on which you walk a lot, esp in the countryside
- washing-up bowl — plastic bowl used for washing dishes
- washington lily — a lily, Lilium washingtonianum, of the western coast of the U.S., having whorled leaves and fragrant, purple-spotted white flowers.
- washington palm — a palm tree, Washingtonia filifera, of California and Florida, having large fan-shaped leaves and small black fruits
- weather balloon — sounding balloon.
- weather station — an installation equipped and used for meteorological observation.
- weatherboarding — an early type of board used as a siding for a building.
- weatherproofing — Present participle of weatherproof.
- wentworth scale — a scale for specifying the sizes (diameters) of sedimentary particles, ranging from clay particles (less than 1⁄256 mm) to boulders (over 256 mm)