13-letter words containing a, t, h, e, o
- 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.
- 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).
- paleethnology — (formerly) the branch of ethnology concerned with the earliest or most primitive human societies.
- palos heights — a city in NE Illinois, near Chicago.
- pantheologist — a student of, or expert in, pantheology
- 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.
- pass the word — If you pass the word, you tell someone something that another person has told you.
- patent holder — a person or company that holds a patent
- pathogenicity — the disease-producing capacity of a pathogen.
- peccatophobia — an abnormal fear of sinning.
- pentadelphous — (of a plant) having its stamens arranged in five groups; (of stamens) being arranged in five groups
- pentastichous — (of plant leaves) arranged in five vertical rows
- 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.
- pharyngectomy — excision of part or all of the pharynx.
- phelloplastic — an image or a representation that has been fashioned from cork
- 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.
- phenomenality — highly extraordinary or prodigious; exceptional: phenomenal speed.
- phenothiazine — Chemistry. a grayish-green to greenish-yellow, crystalline, water-insoluble solid, C 1 2 H 9 NS, used chiefly as an insecticide and vermifuge, and in the synthesis of pharmaceuticals.
- phlogisticate — to integrate or blend phlogiston with
- phone-tapping — Phone-tapping is the activity of listening secretly to someone's phone conversations using special electronic equipment. In most cases phone-tapping is illegal.
- phosphorylate — to introduce the phosphoryl group into (an organic compound).
- photo gallery — display of collected photographs
- photoallergic — photosensitive.
- photochemical — the branch of chemistry that deals with the chemical action of light.
- photocopiable — able or legally permitted to be photocopied
- photogelatine — relating to photographic processes in which gelatine is used in receiving or transferring prints
- photonegative — pertaining to a substance, as selenium, having a conductivity that decreases upon absorption of electromagnetic radiation.
- photoreaction — a chemical reaction that involves or requires light.
- photosynthate — a compound formed by photosynthesis.
- phototelegram — a telegram that is sent by means of phototelegraphy
- phraseologist — a person who treats of or is concerned with phraseology.
- phreatophytic — of, possessing the properties of, or relating to a phreatophyte
- physiotherapy — physical therapy.
- phytochemical — Also called phytonutrient. any of various bioactive chemical compounds found in plants, as antioxidants, considered to be beneficial to human health.
- phytopathogen — an organism that causes disease in plants
- phytoplankter — a minute organism which constitutes part of phytoplankton
- piano teacher — tutor of piano-playing
- plain-clothes — Plain-clothes police officers wear ordinary clothes instead of a police uniform.
- plant hormone — an organic chemical, as auxin, produced by plant cells and functioning at various sites to regulate growth, turning, metabolic processes, etc.