12-letter words containing o, s, e, l
- hazel grouse — a European woodland grouse, Tetrastes bonasia, somewhat resembling the North American ruffed grouse.
- headlongness — Headlong quality or speed; precipitateness.
- headstrongly — In a headstrong manner.
- hearing loss — diminished ability to hear
- heckelphones — Plural form of heckelphone.
- hectocotylus — a modified arm of the male of certain cephalopods that is used to transfer sperm to the female.
- hedge-school — a school held out of doors in favourable weather, indoors in winter
- heldentenors — Plural form of heldentenor.
- helicographs — Plural form of helicograph.
- heliogabalus — (Varius Avitus Bassianus"Marcus Aurelius Antoninus") a.d. 204–222, Roman emperor 218–222.
- heliophilous — attracted to sunlight
- heliospheric — Of or pertaining to the heliosphere.
- heliotropism — heliotropic tendency or growth.
- hellaciously — In a hellacious manner.
- helleborines — Plural form of helleborine.
- hellespontus — an area in the southern hemisphere of Mars.
- hells canyon — a canyon on the Snake River in S Idaho and along the Oregon border: 125 miles (210 km) long with a maximum depth of about 7900 feet (2408 meters).
- helmspersons — Plural form of helmsperson.
- hematoblasts — Plural form of hematoblast.
- hematocolpos — (medicine) A medical condition in which the vagina fills with menstrual blood, often caused by the combination of menstruation with an imperforate hymen.
- hematologist — the study of the nature, function, and diseases of the blood and of blood-forming organs.
- hemerocallis — the genus comprising the day lilies.
- hemodialyses — Plural form of hemodialysis.
- hemodialysis — dialysis of the blood, especially with an artificial kidney, for the removal of waste products.
- hemophiliacs — Plural form of hemophiliac.
- henle's loop — loop of Henle.
- heortologist — a person who studies heortology
- hernioplasty — an operation for the repair of a hernia.
- heron's-bill — stork's-bill (def 1).
- heteroblasty — the morphological changes that occur in plants between juvenility and adulthood
- heteroclisis — (grammar) The presence of two or more classes of inflection in the inflectional paradigm of a noun, verb etc.
- heteroclites — Plural form of heteroclite.
- heterologous — Biology. of different origin; pertaining to heterology.
- heteroplasia — the replacement of normal cells by abnormal cells, as in cancer.
- heteroplasty — the repair of lesions with tissue from another individual or species.
- heterosexual — of, relating to, or exhibiting heterosexuality.
- heterosocial — relating to or denoting mixed-sex social relationships
- heterostyled — (of a plant) having styles of different forms or lengths in the flowers.
- hexasiloxane — (organic chemistry) Any siloxane having six -Si-O- groups.
- highschooler — (US) A student at a high school.
- hispaniolize — to make someone Spanish in their cultural attitudes, values, speech, etc
- hispanophile — an admirer of Hispanic culture or the Spanish language.
- hobble skirt — a woman's skirt that is very narrow at the bottom, causing the wearer to walk with short, mincing steps.
- hobblebushes — Plural form of hobblebush.
- hobbledehoys — Plural form of hobbledehoy.
- hog's fennel — any of several Eurasian umbelliferous marsh plants of the genus Peucedanum, esp P. officinale, having clusters of small whitish flowers
- hojatoleslam — a title of respect given to an ayatollah or a middle-ranking Shiite cleric, which means literally 'proof of Islam'
- holkar state — a former state of central India, ruled by the Holkar dynasty of Maratha rulers of Indore (18th century until 1947)
- hollingshead — Holinshed.
- holmes light — a canister, attached to a life buoy or float, containing calcium carbonate and calcium phosphide, which ignite spontaneously on contact with the water, emitting conspicuous fire and smoke.