13-letter words containing i, o, t, a, s
- half-scottish — Also, Scots. of or relating to Scotland, its people, or their language.
- harmonisation — (British spelling) alternative spelling of harmonization.
- haruspication — the use of animal entrails for divination
- hash function — (programming) A hash coding function which assigns a data item distinguished by some "key" into one of a number of possible "hash buckets" in a hash table. The hash function is usually combined with another more precise function. For example a program might take a string of letters and put it in one of twenty six lists depending on its first letter. Ideally, a hash function should distribute items evenly between the buckets to reduce the number of hash collisions. If, for example, the strings were names beginning with "Mr.", "Miss" or "Mrs." then taking the first letter would be a very poor hash function because all names would hash the same.
- heartstopping — Very exciting or shocking, as though to cause one's heart to skip beats.
- hematogenesis — hematopoiesis.
- hematologists — Plural form of hematologist.
- hematopoiesis — the formation of blood.
- hematosalpinx — (medicine) A medical condition involving bleeding into the Fallopian tubes.
- hemichordates — Plural form of hemichordate.
- hepatectomies — Plural form of hepatectomy.
- herod antipas — died after a.d. 39, ruler of Galilee, a.d. 4–39: ordered the execution of John the Baptist and participated in the trial of Jesus.
- heroic stanza — elegiac stanza.
- hessian boots — a knee-high tasseled boot, fashionable in England in the early 19th century.
- heteroblastic — (of a plant or plant part) showing a marked difference in form between the juvenile and the adult structures
- heteroglossia — (linguistics) the coexistence of distinct varieties within a single linguistic code.
- heteroplastic — the repair of lesions with tissue from another individual or species.
- hippo zarytus — ancient name of Bizerte.
- histochemical — the branch of science dealing with the chemical components of cellular and subcellular tissue.
- histodialysis — histolysis.
- histogramming — (mathematics) The construction of histograms.
- home straight — the section of a racecourse forming the approach to the finish
- homoscedastic — having the same variance.
- homosexuality — sexual desire or behavior directed toward a person or persons of one's own sex.
- hoosier state — Indiana (used as a nickname).
- horse gentian — any weedy North American plant of the genus Triosteum, of the honeysuckle family, especially T. perfoliatum, having stalkless leaves and purplish-brown flowers and bearing orange fruits.
- horse trading — the act or fact of conducting a shrewd exchange or engaging in a horse trade; bargaining.
- horse trailer — lorry for transporting a horse
- horse-trading — to bargain or trade shrewdly.
- hospitability — The quality of being hospitable.
- hospital bill — the bills incurred for receiving hospital treatment
- hospital care — medical treatment provided in a hospital
- hospital case — a patient that is being, or needs to be, treated in a hospital
- hospital pass — a pass made to a team-mate who will be tackled heavily as soon as the ball is received
- hospital ship — a ship built to serve as a hospital, especially used to treat the wounded in wartime and accorded safe passage by international law.
- hospitalizing — Present participle of hospitalize.
- house painter — a person whose occupation is painting houses.
- house trailer — a trailer fitted with accommodations for sleeping, eating, washing, etc.
- house-trained — housebroken.
- housepainters — Plural form of housepainter.
- housetraining — Present participle of housetrain.
- housing start — an instance of beginning the construction of a dwelling.
- hudson strait — a strait connecting Hudson Bay and the Atlantic. 450 miles (725 km) long; 100 miles (160 km) wide.
- hybridisation — Alternative form of hybridization.
- hydrarthrosis — a build-up of fluid or water in the cavity of a joint, esp the knee joint
- hydrostatical — Alternative form of hydrostatic.
- hypercautious — Especially or unreasonably cautious.
- hyposexuality — A significantly low level of sexuality.
- hypostatizing — Present participle of hypostatize.
- hypotheticals — Plural form of hypothetical.