12-letter words containing o, d, y
- hoary-headed — having the gray or white hair of advanced age.
- hobbledehoys — Plural form of hobbledehoy.
- holiday camp — In Britain, a holiday camp is a place which provides holiday accommodation and entertainment for large numbers of people.
- holiday home — a home that people own in order to holiday in and that is in a different location to the home they usually live in
- holidaymaker — vacationer.
- hollywoodian — a person who works for the motion-picture industry located in Hollywood, Calif.
- hollywoodish — of, relating to, or resembling Hollywood, Hollywoodians, or the products of Hollywood and the motion-picture industry.
- home and dry — If you say that someone is, in British English home and dry, or in American English home free, you mean that they have been successful or that they are certain to be successful.
- homodynamous — (biology) Pertaining to, or involving, homodynamy.
- honey badger — ratel.
- hook and eye — a two-piece clothes fastener, usually of metal, consisting of a hook that catches onto a loop or bar.
- horned poppy — any of several Eurasian papaveraceous plants of the genera Glaucium and Roemeria, having large brightly coloured flowers and long curved seed capsules
- horrendously — shockingly dreadful; horrible: a horrendous crime.
- how dare you — You say 'how dare you' when you are very shocked and angry about something that someone has done.
- human comedy — French La Comédie Humaine. a collected edition of tales and novels in 17 volumes (1842–48) by Honoré de Balzac.
- humboldt bay — an inlet of the Pacific Ocean in NW California.
- hybrid vigor — heterosis.
- hydatidiform — like or resembling a hydatid
- hydnocarpate — a salt or ester of hydnocarpic acid.
- hydrobiology — the study of aquatic organisms.
- hydrobromate — (chemistry) hydrobromide.
- hydrobromide — a salt formed by the direct union of hydrobromic acid and an organic base, especially an alkaloid, usually more soluble than the base.
- hydrocarbons — any of a class of compounds containing only hydrogen and carbon, as an alkane, methane, CH 4 , an alkene, ethylene, C 2 H 4 , an alkyne, acetylene, C 2 H 2 , or an aromatic compound, benzene, C 6 H 6 .
- 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.
- hydrocracker — a high-pressure processing unit used for hydrocracking.
- 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.
- hydrodynamic — pertaining to forces in or motions of liquids.
- 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.
- hydroforming — the production of high-octane aromatic compounds for motor fuels by catalytic reforming of naphthas in the presence of hydrogen.
- hydrogen ion — ionized hydrogen of the form H + , found in aqueous solutions of all acids.
- hydrogenated — to combine or treat with hydrogen, especially to add hydrogen to the molecule of (an unsaturated organic compound).
- hydrogenates — Third-person singular simple present indicative form of hydrogenate.
- hydrogenized — Simple past tense and past participle of hydrogenize.
- hydrogeology — the science dealing with the occurrence and distribution of underground water.
- hydrographer — the science of the measurement, description, and mapping of the surface waters of the earth, with special reference to their use for navigation.
- hydrographic — the science of the measurement, description, and mapping of the surface waters of the earth, with special reference to their use for navigation.
- hydrokinesis — (science fiction): The psychic ability to manipulate or control water.
- hydrokinetic — pertaining to the motion of liquids.
- hydrological — the science dealing with the occurrence, circulation, distribution, and properties of the waters of the earth and its atmosphere.
- hydrologists — Plural form of hydrologist.
- hydrolysable — Alternative spelling of hydrolyzable.
- hydrolysates — Plural form of hydrolysate.
- hydrolyzable — Able to be hydrolyzed.
- hydromedusae — Irregular plural form of hydromedusa.