9-letter words containing a, d, o, r
- hardstone — (arts) precious stone or semi-precious stone used to make intaglio, mosaics etc.
- hardwoods — Plural form of hardwood.
- harmdoing — the doing of harm
- harold ii — 1022?–66, king of England 1066: defeated by William the Conqueror at the Battle of Hastings (son of Earl Godwin).
- harpooned — Simple past tense and past participle of harpoon.
- haverford — a township in SE Pennsylvania, near Philadelphia.
- hazardous — full of risk; perilous; risky: a hazardous journey.
- headboard — a board forming the head of anything, especially of a bed.
- headwords — Plural form of headword.
- heartwood — the hard central wood of the trunk of an exogenous tree; duramen.
- herodians — of or relating to Herod the Great, his family, or its partisans.
- hexachord — a diatonic series of six tones having, in medieval music, a half step between the third and fourth tones and whole steps between the others.
- high road — A high road is a main road.
- hoardings — Plural form of hoarding.
- hoarhound — an Old World plant, Marrubium vulgare, of the mint family, having downy leaves and small, whitish flowers, and containing a bitter, medicinal juice that is used as an expectorant, vermifuge, and laxative.
- hoarsened — Simple past tense and past participle of hoarsen.
- hodiernal — (rare) Of or pertaining to the current day.
- hodograph — the figure described by the extremity of a vector that has a fixed origin and a position vector equal to the velocity of a moving particle.
- holandric — of or relating to a heritable trait appearing only in males (opposed to hologynic).
- holderbat — a bracket that supports a pipe and fastens it to a wall or surface
- hole card — Stud Poker. the card dealt face down in the first round of a deal.
- holidayer — vacationer.
- hollander — John, 1929–2013, U.S. poet and critic.
- homewards — Of or pertaining to leading toward home.
- hormisdas — Saint, died a.d. 523, pope 514–523.
- hornyhead — species of fish
- horsehead — moonfish (def 1).
- hospodars — Plural form of hospodar.
- hour hand — the hand that indicates the hours on a clock or watch.
- hybridoma — a hybrid cell made in the laboratory by fusing a normal cell with a cancer cell, usually a myeloma or lymphoma, in order to combine desired features of each, as the ability of the cancer cell to multiply rapidly with the ability of the normal cell to dictate the production of a specific antibody.
- hydration — any of a class of compounds containing chemically combined water. In the case of some hydrates, as washing soda, Na 2 CO 3 ⋅10H 2 O, the water is loosely held and is easily lost on heating; in others, as sulfuric acid, SO 3 ⋅H 2 O, or H 2 SO 4 , it is strongly held as water of constitution.
- hydrazoic — noting or pertaining to hydrazoic acid; triazoic.
- hydrazone — any of a class of compounds containing the group >C=NNH 2 .
- hydrocast — a process in which water is collected at various depths in a device with bottles clamped together, providing data on differing water characteristics.
- hydrolant — an urgent warning of navigational dangers in the Atlantic Ocean, issued by the U.S. Navy Hydrographic Office.
- hydrolase — an enzyme that catalyzes hydrolysis.
- hydronaut — a person trained to work in deep-sea vessels for research and rescue purposes.
- hydrosoma — hydrosome.
- hydrostat — an electrical device for detecting the presence of water, as from overflow or leakage.
- hydrovane — a vane on a seaplane conferring stability on water (a sponson) or facilitating take off (a hydrofoil)
- hydrozoan — any freshwater or marine coelenterate of the class Hydrozoa, including free-swimming or attached types, as the hydra, in which one developmental stage, either the polyp or medusa, is absent, and colonial types, as the Portuguese man-of-war, in which both medusa and polyp stages are present in a single colony.
- hypoderma — hypodermis.
- ideograms — Plural form of ideogram.
- ideograph — an ideogram.
- idiocracy — Government that is based upon abstract theory.
- idiocrasy — idiosyncrasy.
- idiograms — Plural form of idiogram.
- idiograph — a mark or signature characteristic of a particular person, organization, etc.; trademark. Compare logotype (def 2).
- idiolatry — Autolatry, or self worship.
- idolaters — Plural form of idolater.