13-letter words containing a, c, h, l, o, r
- nonhysterical — not hysterical or funny
- nontheatrical — not relating to the theatre
- normal school — (formerly) a school offering a two-year course and certification to high-school graduates preparing to be teachers, especially elementary-school teachers.
- normocephalic — Having a normal sized head; neither macrocephalic nor microcephalic; mesocephalic.
- north channel — a strait between SW Scotland and NE Ireland. 14 miles (23 km) wide at the narrowest point.
- ochlocratical — Pertaining to ochlocracy.
- orchard valve — an alfalfa valve of lesser diameter than the pipe it closes.
- orchestralist — a person who writes or arranges orchestral music
- orchid family — the plant family Orchidaceae, characterized by terrestrial or epiphytic herbaceous plants having simple, parallel-veined, usually alternate leaves, complex and often large and showy flowers pollinated primarily by insects, and fruit in the form of a capsule containing numerous minute seeds, and including calypso, fringed orchis, lady's-slipper, pogonia, rattlesnake plantain, vanilla, as well as numerous tropical orchids such as those of the genera Cattleya, Cymbidium, Dendrobium, Phalaenopsis, and Vanda.
- orthocephalic — having a medium or intermediate relation between the height of the skull and the breadth or length.
- orthoepically — In terms of correct pronunciation.
- orthopaedical — Pertaining to orthopaedics; characteristic of orthopaedia.
- orthosilicate — a silicate mineral
- oscillographs — Plural form of oscillograph.
- oscillography — a device for recording the wave-forms of changing currents, voltages, or any other quantity that can be translated into electric energy, as sound waves.
- parencephalon — a cerebral hemisphere
- perchlorinate — to combine with the maximum proportion of chlorine.
- petrochemical — a chemical substance obtained from petroleum or natural gas, as gasoline, kerosene, or petrolatum.
- petrophysical — relating to the analysis of the constitution and characteristics of rocks
- phallocentric — a doctrine or belief centered on the phallus, especially a belief in the superiority of the male sex.
- pharmacologic — the science dealing with the preparation, uses, and especially the effects of drugs.
- philanthropic — of, pertaining to, engaged in, or characterized by philanthropy; benevolent: a philanthropic foundation.
- phlebographic — relating to phlebography or the X-ray imaging of a vein that has been injected with a dye that is visible on the image taken
- photoallergic — photosensitive.
- polychromatic — having or exhibiting a variety of colors.
- prague school — a school of linguistics emphasizing structure, active in the 1920s and 1930s.
- prophetically — of or relating to a prophet: prophetic inspiration.
- psilanthropic — relating to psilanthropism
- psychobabbler — a person who uses psychobabble
- pyrotechnical — of or relating to pyrotechnics.
- radiochemical — pertaining to or involving radiochemistry.
- ragged school — (in Britain, formerly) a free elementary school for poor children
- reflectograph — a type of mechanical instrument used for communication with spirits or the dead
- reproachfully — full of or expressing reproach or censure: a reproachful look.
- retail anchor — A retail anchor is a popular store whose name will attract customers to a shopping mall.
- rheologically — in a rheological manner
- rhinoscleroma — an inflammatory bacterial disease of the nose that is mostly found in Africa and Central America
- rhizocephalan — belonging to the Rhizocephala, a group of degenerate hermaphrodite crustaceans that are parasitic chiefly on crabs.
- rochelle salt — a white crystalline double salt, sodium potassium tartrate, used in Seidlitz powder. Formula: KNaC4H4O6.4H2O
- royal charter — authorization by the monarchy
- saccharolytic — of or causing the hydrolysis of sugars.
- scalenohedral — a hemihedral crystal form of 8 or 12 faces, each face being a scalene triangle.
- scalenohedron — a hemihedral crystal form of 8 or 12 faces, each face being a scalene triangle.
- scholarliness — of, like, or befitting a scholar: scholarly habits.
- school leaver — School leavers are young people who have just left school, because they have completed their time there.
- schoolmarmish — a female schoolteacher, especially of the old-time country school type, popularly held to be strict and priggish.
- schoolteacher — a teacher in a school, especially in one below the college level.
- sclerotherapy — Medicine/Medical. a treatment for varicose veins in which blood flow is diverted and the veins collapsed by injection of a hardening solution, also used cosmetically in spider veins to eliminate discoloration.
- self-reproach — blame or censure by one's own conscience.
- solar chariot — (in ancient Egypt) a chariot placed in the tomb of a king to transport him to the sun.