13-letter words containing t, h, o, r
- outreach work — work (done by welfare workers, volunteers, etc) designed to help and encourage disadvantaged members of the community
- outside-right — a footballer who plays on the outside right wing of the field
- outstretching — Present participle of outstretch.
- over the hill — a natural elevation of the earth's surface, smaller than a mountain.
- over the hump — a rounded protuberance, especially a fleshy protuberance on the back, as that due to abnormal curvature of the spine in humans, or that normally present in certain animals, as the camel or bison.
- over the moon — extremely joyful
- over the odds — more than is expected, necessary, etc
- over-shipment — an act or instance of shipping freight or cargo.
- over-the-road — of, for, or pertaining to transportation on public highways: over-the-road trucks.
- over-vehement — characterized by rancor or anger; violent: vehement hostility.
- overbreathing — hyperventilation
- overhand knot — a simple knot of various uses that slips easily.
- overhastiness — the condition of being overhasty
- overhead-shot — over one's head; aloft; up in the air or sky, especially near the zenith: There was a cloud overhead.
- overnight bag — a travel bag large enough to hold personal articles and clothing for an overnight trip.
- overstretched — to stretch excessively.
- oxford theory — the theory attributing the authorship of Shakespeare's plays to Edward de Vere, Earl of Oxford, 1550–1604.
- 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.
- painted horse — paint (def 6).
- parasyntheton — a word formed by parasynthesis; for example, kind-hearted
- parental home — a school for problem children.
- parnell shout — a social occasion where each person in a group pays for his or her own entertainment or meal
- parthenocarpy — the production of fruit without fertilization of an egg in the ovary.
- parthenopaeus — a son of Hippomenes and Atalanta, and one of the Seven against Thebes.
- parthenospore — a spore developed without fertilization.
- parthian shot — a sharp, telling remark, act, gesture, etc., made in departing.
- pass the word — If you pass the word, you tell someone something that another person has told you.
- past historic — the simple past
- patent holder — a person or company that holds a patent
- pathomorphism — abnormal morphology.
- peppered moth — a European geometrid moth, Biston betularia, occurring in a pale grey speckled form in rural areas and a black form in industrial regions
- 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.
- phantasmagory — phantasmagoria.
- pharyngectomy — excision of part or all of the pharynx.
- phenobarbital — a white, crystalline powder, C 1 2 H 1 2 N 2 O 3 , used as a sedative, a hypnotic, and as an antispasmodic in epilepsy.
- philanthropic — of, pertaining to, engaged in, or characterized by philanthropy; benevolent: a philanthropic foundation.
- phonautograph — a piece of equipment that records sound visually by detecting the sound waves and indicating them on a graph
- phonoreceptor — a receptor stimulated by sound waves.
- phosphoretted — combined with phosphorus, especially in its lowest valence state.
- phosphorylate — to introduce the phosphoryl group into (an organic compound).
- phosphuretted — treated or combined with phosphorus
- photo gallery — display of collected photographs
- photo-sharing — the publishing of digital photographs on the internet
- photoallergic — photosensitive.
- photochromism — the reversible transformation of something's colour due to exposure to electromagnetic radiation such as sunlight
- photocomposer — a machine for setting type photographically.
- photodetector — photosensor.