13-letter words containing h, a, y, r
- on every hand — on all sides; in all directions
- onychophorans — Plural form of onychophoran.
- openheartedly — Alt form open-heartedly.
- opisthography — the practice of writing on the front and back of a parchment or papyrus
- orange roughy — a marine food fish, Hoplosthenus atlanticus, of S Pacific waters
- orchesography — a written study of dancing
- 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.
- 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.
- oropharyngeal — the part of the pharynx between the soft palate and the upper edge of the epiglottis.
- orthoepically — In terms of correct pronunciation.
- orthogonality — (mathematics, statistics) the property of being orthogonal.
- 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.
- oystercatcher — any of several long-billed wading birds of the genus Haematopus that have chiefly black-and-white plumage and that feed on oysters, clams, mussels, etc.
- parapophysial — of or relating to a parapophysis
- parapsychosis — an abnormal psychosis
- parasynthesis — the formation of a word by the addition of a derivational suffix to a phrase or compound, as of greathearted, which is great heart plus -ed.
- parasynthetic — the formation of a word by the addition of a derivational suffix to a phrase or compound, as of greathearted, which is great heart plus -ed.
- parasyntheton — a word formed by parasynthesis; for example, kind-hearted
- parry channel — a water channel in N Canada running between Baffin Bay on the E and the Arctic Ocean on the W: separates the Queen Elizabeth Islands (N) from the rest of the Arctic Archipelago.
- parthenocarpy — the production of fruit without fertilization of an egg in the ovary.
- party machine — the internal organization of a political party, which decides its policies and directs its activities
- patriarchally — of or relating to a patriarch, the male head of a family, tribe, community, church, order, etc.: my father's conservative, patriarchal ways.
- pay the piper — a person who plays on a pipe.
- pearly whites — white and lustrous as a pearl.
- pennyfarthing — a high bicycle of an early type, with one large wheel in front and one small wheel behind.
- perilymphatic — the fluid between the bony and membranous labyrinths of the ear.
- peripherality — the quality of being peripheral
- perishability — subject to decay, ruin, or destruction: perishable fruits and vegetables.
- petrophysical — relating to the analysis of the constitution and characteristics of rocks
- phantasmagory — phantasmagoria.
- pharmacognosy — materia medica (def 2).
- pharyngealize — to pronounce with pharyngeal coarticulation.
- pharyngectomy — excision of part or all of the pharynx.
- pharyngoscope — an instrument for inspecting the pharynx.
- pharyngoscopy — an examination by means of a pharyngoscope.
- phosphorylase — any enzyme, occurring widely in animal and plant tissue, that in the presence of an inorganic phosphate catalyzes the conversion of glycogen into sugar phosphate.
- phosphorylate — to introduce the phosphoryl group into (an organic compound).
- photo gallery — display of collected photographs
- phreatophytic — of, possessing the properties of, or relating to a phreatophyte
- phrygian mode — an authentic church mode represented on the white keys of a keyboard instrument by an ascending scale from E to E.
- physharmonica — a keyboard musical instrument fitted with free reeds, and which is an early form of harmonium
- physiographic — the science of physical geography.
- physiotherapy — physical therapy.
- phytoplankter — a minute organism which constitutes part of phytoplankton
- phytosanitary — of or relating to the health of plants
- picardy third — a major third in the final tonic chord of a composition written in a minor key.
- plain yoghurt — natural yoghurt, without added flavouring
- play hardball — baseball, as distinguished from softball.
- playwrighting — the writing of plays
- plethysmogram — the recording of a plethysmograph.