13-letter words containing a, u, t, o, r
- heart trouble — cardiac condition
- hepatojugular — (medicine) Relating to the liver and the jugular vein.
- heterocarpous — (of a plant) producing more than one type of fruit
- heterosexuals — Plural form of heterosexual.
- hippo zarytus — ancient name of Bizerte.
- holy saturday — the Saturday in Holy Week.
- holy thursday — Ascension Day.
- honourability — A state or condition or being honourable.
- horticultural — the cultivation of a garden, orchard, or nursery; the cultivation of flowers, fruits, vegetables, or ornamental plants.
- house painter — a person whose occupation is painting houses.
- house trailer — a trailer fitted with accommodations for sleeping, eating, washing, etc.
- house-trained — housebroken.
- household art — any of the skills necessary to the efficient running of a household, as cooking or keeping a family budget.
- 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.
- hunt saboteur — A hunt saboteur is someone who tries to stop a hunt from taking place or being successful because they believe it is cruel to the animal being hunted.
- hydrofracture — (geology) Rock fracture caused by the pressure of freezing water.
- hydrosulphate — a salt formed by the direct union of sulfuric acid with an organic base, especially an alkaloid, and usually more soluble than the base.
- hypercautious — Especially or unreasonably cautious.
- hypermutation — (uncountable) Frequent mutation.
- hyracotherium — eohippus.
- hysteranthous — relating to a plant whose flowers open before its leaves
- ichthyosaurus — ichthyosaur.
- illocutionary — pertaining to a linguistic act performed by a speaker in producing an utterance, as suggesting, warning, promising, or requesting.
- illustrations — Plural form of illustration.
- immunotherapy — treatment designed to produce immunity to a disease or enhance the resistance of the immune system to an active disease process, as cancer.
- importunately — urgent or persistent in solicitation, sometimes annoyingly so.
- inaugurations — Plural form of inauguration.
- inclinatorium — an instrument invented by Robert Norman in 1576, used to determine the degree to which a magnetic needle dips towards the earth; a dipping needle
- inconstruable — unable to be construed
- incorruptable — Misspelling of incorruptible.
- incouragement — Archaic form of encouragement.
- inculturation — enculturation.
- ingurgitation — The act of swallowing greedily or immoderately; that which is so swallowed.
- inquisitorial — of or relating to an inquisitor or inquisition.
- instructional — the act or practice of instructing or teaching; education.
- insubordinate — not submitting to authority; disobedient: an insubordinate soldier.
- insupportable — not endurable; unbearable; insufferable: insupportable pain.
- insupportably — In an insupportable manner.
- insusurration — (obsolete) The act of whispering into something.
- intercommunal — used or shared in common by everyone in a group: a communal jug of wine.
- interlunation — the interlunar period.
- intermountain — located between mountains or mountain ranges: an intermontane lake.
- interneuronal — (neurology) Between neurons.
- interosculant — Mutually touching or intersecting.
- interosculate — to interpenetrate; inosculate.
- intraocularly — into or in the eye
- intravenously — through or within a vein. Abbreviation: IV.