15-letter words containing a, h, o

half wellington — a loose boot extending to just above the ankle and usually worn under the trousers.
half-round file — a file having a semicircular cross-section
half-understood — partially understood
halting problem — The problem of determining in advance whether a particular program or algorithm will terminate or run forever. The halting problem is the canonical example of a provably unsolvable problem. Obviously any attempt to answer the question by actually executing the algorithm or simulating each step of its execution will only give an answer if the algorithm under consideration does terminate, otherwise the algorithm attempting to answer the question will itself run forever. Some special cases of the halting problem are partially solvable given sufficient resources. For example, if it is possible to record the complete state of the execution of the algorithm at each step and the current state is ever identical to some previous state then the algorithm is in a loop. This might require an arbitrary amount of storage however. Alternatively, if there are at most N possible different states then the algorithm can run for at most N steps without looping. A program analysis called termination analysis attempts to answer this question for limited kinds of input algorithm.
hamamelidaceous — belonging to the Hamamelidaceae, the witch hazel family of plants.
hamiltonstovare — a large strong short-haired breed of hound with a black, brown, and white coat
han unification — Han character
hang one's head — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
hanging offence — a crime that is punishable by hanging
hapax legomenon — a word or phrase that appears only once in a manuscript, document, or particular area of literature.
harbour station — the part of a port where boats shelter or station
hard of hearing — partially deaf
hard row to hoe — a number of persons or things arranged in a line, especially a straight line: a row of apple trees.
hard-boiled egg — egg boiled until the yolk is set
hard-luck story — a story of misfortune designed to elicit sympathy
hardhead sponge — any of several commercial sponges, as Spongia officinalis dura, of the West Indies and Central America, having a harsh, fibrous, resilient skeleton.
hare and hounds — an outdoor game in which certain players, the hares, start off in advance on a long run, scattering small pieces of paper, called the scent, with the other players, the hounds, following the trail so marked in an effort to catch the hares before they reach a designated point.
harmonic motion — periodic motion consisting of one or more vibratory motions that are symmetric about a region of equilibrium, as the motion of a vibrating string of a musical instrument.
harmonic series — a series in which the reciprocals of the terms form an arithmetic progression.
haulage company — a firm that transports goods by lorry
hausdorff space — a topological space in which each pair of points can be separated by two disjoint open sets containing the points.
haute-normandie — a region of NW France, on the English Channel: generally fertile and flat
have (down) pat — to know or have memorized thoroughly
have a crush on — be attracted to: sb
have a derry on — to have a prejudice or grudge against
have a go at sb — If someone has a go at you, they criticize you, often in a way that you feel is unfair.
have a good day — pleasantry
have a right to — be entitled to
have an edge on — a line or border at which a surface terminates: Grass grew along the edges of the road. The paper had deckle edges.
have an eye for — the organ of sight, in vertebrates typically one of a pair of spherical bodies contained in an orbit of the skull and in humans appearing externally as a dense, white, curved membrane, or sclera, surrounding a circular, colored portion, or iris, that is covered by a clear, curved membrane, or cornea, and in the center of which is an opening, or pupil, through which light passes to the retina.
have got it bad — to be infatuated
have had enough — be weary, exasperated
have it so good — to have so many benefits, esp material benefits
have no use for — to employ for some purpose; put into service; make use of: to use a knife.
have nothing on — be naked
have one's pick — If you have your pick of a group of things, you are able to choose any of them that you want.
have the ear of — to be in a position to influence
have to do with — Usually, haves. an individual or group that has wealth, social position, or other material benefits (contrasted with have-not).
have to lump it — If you say that someone will have to lump it, you mean that they must accept a situation or decision whether they like it or not.
have words with — to argue angrily with
hay conditioner — either of two machines, one designed to crush stems of hay, the other to break and bend them, in order to cause more rapid and even drying
hazardous waste — any industrial by-product, especially from the manufacture of chemicals, that is destructive to the environment or dangerous to the health of people or animals: Hazardous wastes often contaminate ground water.
head over heels — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
heads will roll — If you say that heads will roll as a result of something bad that has happened, you mean that people will be punished for it, especially by losing their jobs.
hearing ear dog — a dog that has been trained to alert a hearing-impaired person to sounds, as a telephone ringing or dangerous noises.
hearing-ear dog — a dog that has been trained to alert a hearing-impaired person to sounds, as a telephone ringing or dangerous noises.
heart condition — cardiac disorder
heart of hearts — the depths of one's conscience or emotions
heart operation — a surgical operation performed on the heart
heart tamponade — tamponade (def 2).

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