12-letter words containing a, s, c, e, i
- helical scan — denoting a recording technique used with video tapes in which the recorded tracks on the tape are segments of a helix
- helicographs — Plural form of helicograph.
- hellaciously — In a hellacious manner.
- hemerocallis — the genus comprising the day lilies.
- hemodynamics — the branch of physiology dealing with the forces involved in the circulation of the blood.
- hemophiliacs — Plural form of hemophiliac.
- heterosocial — relating to or denoting mixed-sex social relationships
- hexacosanoic — as in hexacosanoic acid
- hierarchists — hierarchical principles, rule, or influence.
- hierocracies — Plural form of hierocracy.
- hire charges — the amount of money it costs to hire something, such as a bike, car, etc
- hit the sack — a large bag of strong, coarsely woven material, as for grain, potatoes, or coal.
- hoisin sauce — a thick, sweet, spicy condiment containing soybeans, sugar, garlic, and chili peppers, used in cooking or as an accompaniment to meat, fish, or poultry, especially Peking duck.
- horse racing — a contest of speed among horses that either are ridden by jockeys or pull sulkies and their drivers.
- hunting case — a watchcase with a hinged cover to protect the crystal.
- hydroelastic — undergoing a change in elasticity as a result of the flow of water or another fluid
- hyper-social — relating to, devoted to, or characterized by friendly companionship or relations: a social club.
- hyperalgesic — Of or pertaining to hyperalgesia.
- hyperplastic — Of, or relating to hyperplasia.
- hypersomniac — a tendency to sleep excessively.
- hysterically — of, relating to, or characterized by hysteria.
- iatrochemist — a person who practises iatrochemistry
- icbm address — (networking, humour) (Or "missile address") The form used to register a site with the Usenet mapping project includes a space for longitude and latitude, preferably to seconds-of-arc accuracy. This is actually used for generating geographically-correct maps of Usenet links on a plotter; however, it has become traditional to refer to this as one's "ICBM address" or "missile address", and many people include it in their sig block with that name. (A real missile address would include target altitude.)
- ice crystals — ice formations
- iceland moss — an edible lichen, Cetraria islandica, of arctic regions, containing a starchlike substance used in medicine.
- iceland spar — a transparent variety of calcite that is double-refracting and is used as a polarizer.
- icosahedrons — Plural form of icosahedron.
- illiteracies — Plural form of illiteracy.
- impeachments — Plural form of impeachment.
- implicatures — Plural form of implicature.
- importancies — Plural form of importancy.
- imprecations — Plural form of imprecation.
- in search of — looking for, seeking
- in substance — that of which a thing consists; physical matter or material: form and substance.
- in that case — then
- in the cards — a usually rectangular piece of stiff paper, thin pasteboard, or plastic for various uses, as to write information on or printed as a means of identifying the holder: a 3″ × 5″ file card; a membership card.
- inabstinence — a lack of abstinence or abstention
- inaccessible — Unable to be reached.
- inaccessibly — In an inaccessible manner.
- inaccuracies — Plural form of inaccuracy.
- inadequacies — Plural form of inadequacy.
- incalescence — The state of being incalescent, or growing warm.
- incandescent — (of light) produced by incandescence.
- incapacities — Plural form of incapacity.
- incapsulated — Simple past tense and past participle of incapsulate.
- incapsulates — Third-person singular simple present indicative form of incapsulate.
- incarcerates — Third-person singular simple present indicative form of incarcerate.
- incendiaries — Plural form of incendiary.
- incendiarism — the act or practice of an arsonist; malicious burning.
- inchoateness — The quality of being inchoate.