13-letter words containing s, i, o, u
- ground sluice — a trench, cut through a placer or through bedrock, through which a stream is diverted in order to dislodge and wash the gravel.
- guesstimation — (pejorative) An estimation made without good justification and often biased.
- gulf of lions — a wide bay of the Mediterranean off the S coast of France, between the Spanish border and Toulon
- gulf of sidra — a wide inlet of the Mediterranean on the N coast of Libya
- gynodioecious — having female flowers on one plant and hermaphrodite flowers on another plant of the same species.
- hallucinogens — Plural form of hallucinogen.
- 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.
- hemicellulose — any of a group of gummy polysaccharides, intermediate in complexity between sugar and cellulose, that hydrolyze to monosaccharides more readily than cellulose.
- heteroclitous — heteroclite
- high-sounding — having an impressive or pretentious sound; grand: the high-sounding titles of minor officials.
- hilariousness — The characteristic of being hilarious; hilarity.
- hippo zarytus — ancient name of Bizerte.
- holosericeous — covered with short, silky hairs.
- home counties — The Home Counties are the counties which surround London.
- homosexualism — A sexual attraction to (or sexual relations with) individuals of the same sex.
- homosexuality — sexual desire or behavior directed toward a person or persons of one's own sex.
- honoris causa — for the sake of honour
- hortus siccus — a collection of dried plants; herbarium.
- house cricket — a dark brown cricket, Acheta domesticus, having a light-colored head with dark crossbands, commonly occurring throughout North America and Europe, where it may be an indoor pest.
- house officer — a doctor who is the most junior member of the medical staff of a hospital, usually resident in the hospital
- house painter — a person whose occupation is painting houses.
- house slipper — a slipper worn in the house or indoors, often distinguished from a bedroom slipper by having a back and heel.
- house trailer — a trailer fitted with accommodations for sleeping, eating, washing, etc.
- house-hunting — the act of searching for a house to buy or rent
- house-raising — a gathering of persons in a rural community to help one of its members build a house.
- house-trained — housebroken.
- house-warming — a party to celebrate a person's or family's move to a new home.
- housebreaking — to train (a pet) to excrete outdoors or in a specific place.
- housebuilding — The trade or activity of building houses.
- housecleaning — the act of cleaning a house, room, etc., and its furnishings, especially the act of cleaning thoroughly and completely.
- housed string — a string of a stair (housed stair) receiving the ends of the risers or treads in a series of housings.
- housemistress — A female teacher in charge of a dormitory at a boarding school.
- housepainters — Plural form of housepainter.
- housetraining — Present participle of housetrain.
- housewarmings — Plural form of housewarming.
- housewifeship — the role of a housewife, household management
- housing start — an instance of beginning the construction of a dwelling.
- housing stock — the total number of houses, flats, etc, in an area
- hudson strait — a strait connecting Hudson Bay and the Atlantic. 450 miles (725 km) long; 100 miles (160 km) wide.
- hunting sword — a short, light saber of the 18th century, having a straight or slightly curved blade.
- hyaluronidase — Biochemistry. a mucolytic enzyme found in the testes, in snake venom, and in hemolytic streptococci and certain other bacteria, that decreases the viscosity of the intercellular matrix by breaking down hyaluronic acid.
- hydromedusoid — a jellyfish or something resembling a jellyfish that lives in water
- hydrosulfides — Plural form of hydrosulfide.
- hydrosulfuric — (chemistry) Derived from hydrogen sulfide considered as hydrosulfuric acid.
- hydrosulphide — a compound containing the univalent group –HS.
- hydrosulphite — hyposulfite (def 1).
- hypercautious — Especially or unreasonably cautious.
- hypoperfusion — (medicine) Decreased perfusion of blood through an organ.
- hyposexuality — A significantly low level of sexuality.