| abfarad | (noun) a capacitance unit equal to one billion farads | - |
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| abradant | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abrader |
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| (noun) a substance that abrades or wears down | Synonyms: abrasive, abrasive material |
| abrader | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abradant |
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| andradite | (noun) a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone | - |
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| antitrade | (noun) winds blowing from west to east and lying above the trade winds in the tropics | Synonyms: antitrade wind |
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| antitrades | (noun) wind in the upper atmosphere blowing above but in the opposite direction from the trade winds | - |
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| atmoradiograph | (noun) a device which measures the frequency of occurrence of atmospherics. | - |
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| autoradiograph | (noun) a radiogram produced by radiation emitted by the specimen being photographed | - |
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| autoradiography | (noun) producing a radiograph by means of the radiation emitted from the specimen being photographed | - |
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| autostrada | (noun) an expressway in an Italian-speaking country | - |
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| balustrade | (noun) a railing at the side of a staircase or balcony to prevent people from falling | Synonyms: balusters, banister, bannister, handrail |
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| bigarade | (noun) any of various common orange trees yielding sour or bitter fruit; used as grafting stock | Synonyms: bitter orange, bitter orange tree, Citrus aurantium, marmalade orange, Seville orange, sour orange |
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| brad | (noun) a small nail | - |
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| bradawl | (noun) an awl for making small holes for brads or small screws | Synonyms: pricker |
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| bradycardia | (noun) abnormally slow heartbeat | - |
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| camaraderie | (noun) the quality of affording easy familiarity and sociability | Synonyms: chumminess, comradeliness, comradery, comradeship |
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| charade | (noun) making a false outward show | Synonyms: masquerade |
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| (noun) a word acted out in an episode of the game of charades | - |
| charades | (noun) guessing game in which one player pantomimes a word or phrase for others to guess | - |
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| coloradillo | (noun) handsome shrub with showy orange to scarlet or crimson flowers; Florida and West Indies to Mexico and Brazil | Synonyms: Hamelia erecta, Hamelia patens, scarlet bush, scarlet hamelia |
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| comrade | (noun) a friend who is frequently in the company of another | Synonyms: associate, companion, familiar, fellow |
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| (noun) used as a term of address for those male persons engaged in the same movement | Synonyms: brother |
| comradeliness | (noun) the quality of affording easy familiarity and sociability | Synonyms: camaraderie, chumminess, comradery, comradeship |
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| comradery | (noun) the quality of affording easy familiarity and sociability | Synonyms: camaraderie, chumminess, comradeliness, comradeship |
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| comradeship | (noun) the quality of affording easy familiarity and sociability | Synonyms: camaraderie, chumminess, comradeliness, comradery |
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| contradance | (noun) a type of folk dance in which couples are arranged in sets or face one another in a line | Synonyms: contra danse, contredanse, country-dance, country dancing |
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| contradiction | (noun) the speech act of contradicting someone | - |
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| (noun) (logic) a statement that is necessarily false | Synonyms: contradiction in terms |
| (noun) opposition between two conflicting forces or ideas | - |
| contradictoriness | (noun) the relation that exists when opposites cannot coexist | - |
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| contradictory | (noun) two propositions are contradictories if both cannot be true (or both cannot be false) at the same time | - |
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| contradistinction | (noun) a distinction drawn on the basis of contrast | - |
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| cradle | (noun) a baby bed with sides and rockers | - |
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| (noun) a trough that can be rocked back and forth; used by gold miners to shake auriferous earth in water in order to separate the gold | Synonyms: rocker |
| (noun) where something originated or was nurtured in its early existence | Synonyms: birthplace, place of origin, provenance, provenience |
| (noun) birth of a person | - |
| cradlesong | (noun) the act of singing a quiet song to lull a child to sleep | Synonyms: lullaby |
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| (noun) a quiet song intended to lull a child to sleep | Synonyms: berceuse, lullaby |
| degradation | (noun) changing to a lower state (a less respected state) | Synonyms: debasement |
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| (noun) a low or downcast state | Synonyms: abasement, abjection |
| degrader | (noun) a person who lowers the quality or character or value (as by adding cheaper metal to coins) | Synonyms: debaser |
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| desperado | (noun) a bold outlaw (especially on the American frontier) | Synonyms: desperate criminal |
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| digitigrade | (noun) an animal that walks so that only the toes touch the ground as e.g. dogs and cats and horses | Synonyms: digitigrade mammal |
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| downgrade | (noun) the property possessed by a slope or surface that descends | - |
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| eldorado | (noun) an imaginary place of great wealth and opportunity; sought in South America by 16th-century explorers | Synonyms: El Dorado |
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| eradication | (noun) the complete destruction of every trace of something | Synonyms: obliteration |
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| eradicator | (noun) someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects) | Synonyms: exterminator, terminator |
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| estradiol | (noun) the most powerful female hormone that occurs naturally; synthesized and used to treat estrogen deficiency and breast cancer | Synonyms: oestradiol |
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| extradition | (noun) the surrender of an accused or convicted person by one state or country to another (usually under the provisions of a statute or treaty) | - |
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| extrados | (noun) the exterior curve of an arch | - |
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| farad | (noun) the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates | Synonyms: F |
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| fradicin | (noun) an antibiotic obtained from an actinomycete and used (as a sulphate under the trade name Neobiotic) as an intestinal antiseptic in surgery | Synonyms: Neobiotic, neomycin |
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| grad | (noun) a person who has received a degree from a school (high school or college or university) | Synonyms: alum, graduate |
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| (noun) one-hundredth of a right angle | Synonyms: grade |
| gradation | (noun) the act of arranging in grades | Synonyms: graduation |
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| (noun) a degree of ablaut | Synonyms: grade |
| (noun) relative position in a graded series | Synonyms: step |
| grade | (noun) a variety of cattle produced by crossbreeding with a superior breed | - |
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| (noun) a position on a scale of intensity or amount or quality | Synonyms: degree, level |
| (noun) the gradient of a slope or road or other surface | - |
| (noun) the height of the ground on which something stands | Synonyms: ground level |
| (noun) a number or letter indicating quality (especially of a student's performance) | Synonyms: mark, score |
| (noun) a degree of ablaut | Synonyms: gradation |
| (noun) a body of students who are taught together | Synonyms: class, course, form |
| (noun) one-hundredth of a right angle | Synonyms: grad |
| (noun) a relative position or degree of value in a graded group | Synonyms: level, tier |
| grader | (noun) a judge who assigns grades to something | - |
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| gradient | (noun) the property possessed by a line or surface that departs from the horizontal | Synonyms: slope |
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| (noun) a graded change in the magnitude of some physical quantity or dimension | - |
| grading | (noun) the act of arranging in a graduated series | Synonyms: scaling |
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| (noun) evaluation of performance by assigning a grade or score | Synonyms: marking, scoring |
| (noun) changing the ground level to a smooth horizontal or gently sloping surface | Synonyms: leveling |
| gradual | (noun) (Roman Catholic Church) an antiphon (usually from the Book of Psalms) immediately after the epistle at Mass | - |
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| graduality | (noun) the quality of being gradual or of coming about by gradual stages | Synonyms: gradualness |
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| gradualness | (noun) the quality of being gradual or of coming about by gradual stages | Synonyms: graduality |
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| (noun) the property possessed by a slope that is very gradual | Synonyms: gentleness |
| graduate | (noun) a measuring instrument for measuring fluid volume; a glass container (cup or cylinder or flask) whose sides are marked with or divided into amounts | - |
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| (noun) a person who has received a degree from a school (high school or college or university) | Synonyms: alum, grad |
| graduation | (noun) the act of arranging in grades | Synonyms: gradation |
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| (noun) the successful completion of a program of study | - |
| (noun) a line (as on a vessel or ruler) that marks a measurement | - |
| (noun) an academic exercise in which diplomas are conferred | Synonyms: commencement, commencement ceremony, commencement exercise, graduation exercise |
| horseradish | (noun) grated horseradish root | - |
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| (noun) coarse Eurasian plant cultivated for its thick white pungent root | Synonyms: Armoracia rusticana, horse radish, red cole |
| (noun) the root of the horseradish plant; it is grated or ground and used for seasoning | Synonyms: horseradish root |
| hyperadrenalism | (noun) a glandular disorder caused by excessive ACTH resulting in greater than normal functioning of the adrenal gland; characterized by obesity | Synonyms: Cushing's disease |
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| hyperadrenocorticism | (noun) a glandular disorder caused by excessive cortisol | Synonyms: Cushing's syndrome |
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| intrados | (noun) the interior curve of an arch | - |
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| irradiation | (noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance | Synonyms: actinotherapy, radiation, radiation therapy, radiotherapy |
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| (noun) the apparent enlargement of a bright object when viewed against a dark background | - |
| (noun) (Pavolvian conditioning) the elicitation of a conditioned response by stimulation similar but not identical to the original stimulus | - |
| (noun) (physiology) the spread of sensory neural impulses in the cortex | - |
| (noun) a column of light (as from a beacon) | Synonyms: beam, beam of light, light beam, ray, ray of light, shaft, shaft of light |
| (noun) the condition of being exposed to radiation | - |
| masquerade | (noun) making a false outward show | Synonyms: charade |
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| (noun) a costume worn as a disguise at a masquerade party | Synonyms: fancy dress, masquerade costume |
| (noun) a party of guests wearing costumes and masks | Synonyms: mask, masque, masquerade party |
| masquerader | (noun) a participant in a masquerade | Synonyms: masker, masquer |
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| microfarad | (noun) a unit of capacitance equal to one millionth of a farad | - |
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| microradian | (noun) a unit of angular distance equal to one thousandth of a milliradian | - |
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| millifarad | (noun) a unit of capacitance equal to one thousandth of a farad | - |
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| milliradian | (noun) a unit of angular distance equal to one thousandth of a radian | - |
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| noradrenaline | (noun) a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses | Synonyms: norepinephrine |
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| oestradiol | (noun) the most powerful female hormone that occurs naturally; synthesized and used to treat estrogen deficiency and breast cancer | Synonyms: estradiol |
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| parade | (noun) a visible display | - |
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| (noun) a ceremonial procession including people marching | - |
| (noun) an extended (often showy) succession of persons or things | - |
| parader | (noun) walks with regular or stately step | Synonyms: marcher |
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| paradiddle | (noun) the sound of a drum (especially a snare drum) beaten rapidly and continuously | Synonyms: drum roll, roll |
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| paradigm | (noun) a standard or typical example | Synonyms: epitome, image, prototype |
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| (noun) the generally accepted perspective of a particular discipline at a given time | - |
| (noun) the class of all items that can be substituted into the same position (or slot) in a grammatical sentence (are in paradigmatic relation with one another) | Synonyms: substitution class |
| (noun) systematic arrangement of all the inflected forms of a word | - |
| paradise | (noun) any place of complete bliss and delight and peace | Synonyms: Eden, heaven, nirvana, promised land, Shangri-la |
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| paradox | (noun) (logic) a statement that contradicts itself | - |
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| paygrade | (noun) rank in a military organization | Synonyms: military rank, military rating, rating |
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| peradventure | (noun) doubt or uncertainty as to whether something is the case | - |
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| picofarad | (noun) a unit of capacitance equal to one trillionth of a farad | - |
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| plantigrade | (noun) an animal that walks with the entire sole of the foot touching the ground as e.g. bears and human beings | Synonyms: plantigrade mammal |
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| postgraduate | (noun) a student who continues studies after graduation | Synonyms: grad student, graduate student |
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| rad | (noun) a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material | - |
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| (noun) the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees) | Synonyms: radian |
| radar | (noun) measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects | Synonyms: microwave radar, radio detection and ranging, radiolocation |
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| raddle | (noun) a red iron ore used in dyeing and marking | Synonyms: reddle, ruddle |
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| radial | (noun) pneumatic tire that has radial-ply casing | Synonyms: radial-ply tire, radial tire |
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| radian | (noun) the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees) | Synonyms: rad |
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| radiance | (noun) the quality of being bright and sending out rays of light | Synonyms: effulgence, radiancy, refulgence, refulgency, shine |
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| (noun) the amount of electromagnetic radiation leaving or arriving at a point on a surface | Synonyms: glow, glowing |
| (noun) an attractive combination of good health and happiness | - |
| radiancy | (noun) the quality of being bright and sending out rays of light | Synonyms: effulgence, radiance, refulgence, refulgency, shine |
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| radiation | (noun) the act of spreading outward from a central source | - |
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| (noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance | Synonyms: actinotherapy, irradiation, radiation therapy, radiotherapy |
| (noun) a radial arrangement of nerve fibers connecting different parts of the brain | - |
| (noun) the spread of a group of organisms into new habitats | - |
| (noun) energy that is radiated or transmitted in the form of rays or waves or particles | - |
| (noun) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay | Synonyms: radioactivity |
| (noun) syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours | Synonyms: radiation sickness, radiation syndrome |
| radiator | (noun) a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fan | - |
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| (noun) heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings | - |
| (noun) any object that radiates energy | - |
| radical | (noun) a character conveying the lexical meaning of a logogram | - |
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| (noun) (linguistics) the form of a word after all affixes are removed | Synonyms: base, root, root word, stem, theme |
| (noun) a person who has radical ideas or opinions | - |
| (noun) (mathematics) a quantity expressed as the root of another quantity | - |
| (noun) (chemistry) two or more atoms bound together as a single unit and forming part of a molecule | Synonyms: chemical group, group |
| (noun) an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule | Synonyms: free radical |
| radicalism | (noun) the political orientation of those who favor revolutionary change in government and society | - |
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| radicchio | (noun) prized variety of chicory having globose heads of red leaves | - |
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| radicle | (noun) (anatomy) a small structure resembling a rootlet (such as a fibril of a nerve) | - |
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| radiculitis | (noun) inflammation of the radicle of a nerve | - |
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| radio | (noun) a communication system based on broadcasting electromagnetic waves | Synonyms: wireless |
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| (noun) an electronic receiver that detects and demodulates and amplifies transmitted signals | Synonyms: radio receiver, radio set, receiving set, tuner, wireless |
| (noun) medium for communication | Synonyms: radiocommunication, wireless |
| radioactivity | (noun) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay | Synonyms: radiation |
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| radiobiologist | (noun) a biologist who studies the effects of radiation on living organisms | - |
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| radiobiology | (noun) the branch of biology that studies the effects of radiation on living organisms | - |
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| radiocarbon | (noun) a radioactive isotope of carbon | Synonyms: carbon 14 |
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| radiochemist | (noun) a chemist who specializes in nuclear chemistry | Synonyms: nuclear chemist |
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| radiochemistry | (noun) the chemistry of radioactive substances | Synonyms: nuclear chemistry |
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| radiochlorine | (noun) a radioactive isotope of chlorine | - |
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