12-letter words containing c, h, l, o, r
- harmonically — pertaining to harmony, as distinguished from melody and rhythm.
- helicobacter — Any member of the Helicobacter bacteria.
- helicographs — Plural form of helicograph.
- helicoptered — Simple past tense and past participle of helicopter.
- heliocentric — measured or considered as being seen from the center of the sun.
- heliographic — a device for signaling by means of a movable mirror that reflects beams of light, especially sunlight, to a distance.
- heliospheric — Of or pertaining to the heliosphere.
- hemerocallis — the genus comprising the day lilies.
- heroicomical — blending heroic and comic elements: a heroicomic poem.
- herpetologic — Alternative form of herpetological.
- heterocercal — having an unequally divided tail, characteristic of sharks, rays, and skates.
- 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.
- heteroclitic — (linguistics) In linguistics, particularly Indo-European Studies, signifying a stem which alternates between more than one form when declined for grammatical case. Examples of heteroclitic noun stems in Proto-Indo-European include '*wod-r/n-'
- heterocyclic — of or relating to the branch of chemistry dealing with cyclic compounds in which at least one of the ring members is not a carbon atom (contrasted with homocyclic).
- heterodactyl — having the first and fourth toes directed backward, and the second and third forward, as in trogons.
- heteroleptic — (chemistry) Describing an organometallic compound having two or more types of ligand.
- heterophilic — Also, heterophilic. Immunology. (of an antibody) having an affinity for an antigen other than its specific antigen.
- heterosocial — relating to or denoting mixed-sex social relationships
- hexacarbonyl — (inorganic chemistry) Any compound having six carbonyl groups.
- hexachloride — a chloride containing six atoms of chlorine.
- hieroglyphic — Also, hieroglyphical. designating or pertaining to a pictographic script, particularly that of the ancient Egyptians, in which many of the symbols are conventionalized, recognizable pictures of the things represented.
- high-colored — deep in color; vivid.
- highschooler — (US) A student at a high school.
- hill country — hilly area
- historically — of, pertaining to, treating, or characteristic of history or past events: historical records; historical research.
- histrionical — (British) Alternative form of histrionic.
- holophrastic — using or consisting of a single word that functions as a phrase or sentence.
- holy picture — a picture of a person or thing that is of religious importance
- homeschooler — One who homeschools a student (typically the parent).
- horizon club — a division of Camp Fire, Inc., for members of high-school age.
- horn balance — an extension of an aircraft control surface that projects in front of the hinge providing aerodynamic assistance in moving the control
- horometrical — Relating to horometry.
- horrifically — causing horror.
- horse-collar — (especially in baseball) a score of zero.
- horticulture — the cultivation of a garden, orchard, or nursery; the cultivation of flowers, fruits, vegetables, or ornamental plants.
- housecleaner — Someone employed to clean a house.
- hydrocephaly — an accumulation of serous fluid within the cranium, especially in infancy, due to obstruction of the movement of cerebrospinal fluid, often causing great enlargement of the head; water on the brain.
- hydrochloric — of or derived from hydrochloric acid.
- hydrocolloid — a substance that forms a colloid when combined with water.
- hydrocooling — the process or technique of arresting the ripening of fruits and vegetables after harvesting by immersion in ice water.
- hydroculture — A type of hydroponics in which plants are grown in a medium that allows the distribution of water and nutrients through capillary action.
- hydrocyclone — A hydrocyclone is a vessel used for separating two liquids with different densities, by the circular movement of fluid.
- hydroecology — The study of support systems in wetlands such as the interactions between water and wildlife habitats.
- hydroelastic — undergoing a change in elasticity as a result of the flow of water or another fluid
- hydrofluoric — of or derived from hydrofluoric acid.
- hydrological — the science dealing with the occurrence, circulation, distribution, and properties of the waters of the earth and its atmosphere.
- hydronically — in a hydronic manner; in a manner relating to a heating system that uses water
- hyper-social — relating to, devoted to, or characterized by friendly companionship or relations: a social club.
- hyperbolical — having the nature of hyperbole; exaggerated.