| abalone | (noun) any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior | Synonyms: ear-shell |
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| acetone | (noun) the simplest ketone; a highly flammable liquid widely used as an organic solvent and as material for making plastics | Synonyms: dimethyl ketone, propanone |
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| acetonemia | (noun) an abnormal increase of ketone bodies in the blood as in diabetes mellitus | Synonyms: ketonemia, ketosis |
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| adrenosterone | (noun) a steroid having androgenic activity; obtained from the cortex of the adrenal gland | - |
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| aitchbone | (noun) a cut of beef including the H-shaped rump bone | - |
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| aldosterone | (noun) a corticosteroid hormone that is secreted by the cortex of the adrenal gland; regulates salt (sodium and potassium) and water balance | - |
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| aleurone | (noun) granular protein in outermost layer of endosperm of many seeds or cereal grains | - |
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| allophone | (noun) (linguistics) any of various acoustically different forms of the same phoneme | - |
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| almoner | (noun) an official in a British hospital who looks after the social and material needs of the patients | Synonyms: medical social worker |
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| aloneness | (noun) a disposition toward being alone | Synonyms: loneliness, lonesomeness, solitariness |
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| amiodarone | (noun) an antiarrhythmic drug (trade name Cordarone) that has potentially fatal side effects and is used to control serious heart rhythm problems only when safer agents have been ineffective | Synonyms: Cordarone |
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| amrinone | (noun) a drug (trade name Inocor) used intravenously in heart failure; increases strength of contraction of myocardium | Synonyms: Inocor |
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| androsterone | (noun) an androgenic hormone that is less active than testosterone | - |
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| anemone | (noun) marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton | Synonyms: sea anemone |
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| (noun) any woodland plant of the genus Anemone grown for its beautiful flowers and whorls of dissected leaves | Synonyms: windflower |
| anklebone | (noun) the bone in the ankle that articulates with the leg bones to form the ankle joint | Synonyms: astragal, astragalus, talus |
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| anticyclone | (noun) (meteorology) winds spiraling outward from a high pressure center; circling clockwise in the Northern Hemisphere and counterclockwise in the southern | - |
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| aponeurosis | (noun) any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons | - |
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| argemone | (noun) any plant of the genus Argemone having large white or yellow flowers and prickly leaves and stems and pods; chiefly of tropical America | Synonyms: devil's fig, prickly poppy, white thistle |
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| atonement | (noun) the act of atoning for sin or wrongdoing (especially appeasing a deity) | Synonyms: expiation, propitiation |
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| (noun) compensation for a wrong | Synonyms: expiation, satisfaction |
| auctioneer | (noun) an agent who conducts an auction | - |
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| axone | (noun) long nerve fiber that conducts away from the cell body of the neuron | Synonyms: axon |
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| backbone | (noun) the part of a network that connects other networks together | - |
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| (noun) the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved | Synonyms: spine |
| (noun) fortitude and determination | Synonyms: grit, gumption, guts, moxie, sand |
| (noun) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord | Synonyms: back, rachis, spinal column, spine, vertebral column |
| (noun) a central cohesive source of support and stability | Synonyms: anchor, keystone, linchpin, lynchpin, mainstay |
| baloney | (noun) pretentious or silly talk or writing | Synonyms: bilgewater, boloney, bosh, drool, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
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| bandoneon | (noun) a type of concertina popular in South America | - |
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| barbitone | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, diethylbarbituric acid, diethylmalonylurea, veronal |
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| baritone | (noun) the second lowest brass wind instrument | Synonyms: baritone horn |
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| (noun) the second lowest adult male singing voice | Synonyms: baritone voice |
| (noun) a male singer | Synonyms: barytone |
| baroness | (noun) a noblewoman who holds the rank of baron or who is the wife or widow of a baron | - |
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| baronet | (noun) a member of the British order of honor; ranks below a baron but above a knight | Synonyms: Bart |
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| baronetage | (noun) the state of a baronet | - |
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| (noun) the collective body of baronets | - |
| baronetcy | (noun) the title of a baron | - |
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| (noun) the rank or dignity or position of a baronet or baroness | Synonyms: barony |
| barytone | (noun) a male singer | Synonyms: baritone |
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| bayonet | (noun) a knife that can be fixed to the end of a rifle and used as a weapon | - |
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| benzoquinone | (noun) any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes | Synonyms: quinone |
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| bilestone | (noun) a calculus formed in the gall bladder or its ducts | Synonyms: gallstone |
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| bloodstone | (noun) green chalcedony with red spots that resemble blood | Synonyms: heliotrope |
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| bludgeoner | (noun) an assailant who uses a bludgeon | - |
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| bluestone | (noun) bluish-grey sandstone used for paving and building | - |
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| boloney | (noun) pretentious or silly talk or writing | Synonyms: baloney, bilgewater, bosh, drool, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
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| bone | (noun) a shade of white the color of bleached bones | Synonyms: ivory, off-white, pearl |
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| (noun) rigid connective tissue that makes up the skeleton of vertebrates | Synonyms: os |
| (noun) the porous calcified substance from which bones are made | Synonyms: osseous tissue |
| bonefish | (noun) slender silvery marine fish found in tropical mud flats and mangrove lagoons | Synonyms: Albula vulpes |
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| bonehead | (noun) a stupid person; these words are used to express a low opinion of someone's intelligence | Synonyms: blockhead, dumbass, dunce, dunderhead, fuckhead, hammerhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull, shithead |
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| bonelet | (noun) a small bone; especially one in the middle ear | Synonyms: ossicle, ossiculum |
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| bonemeal | (noun) fertilizer made of ground bones | - |
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| boner | (noun) an embarrassing mistake | Synonyms: bloomer, blooper, blunder, boo-boo, botch, bungle, flub, foul-up, fuckup, pratfall |
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| bones | (noun) (used in the plural) a percussion instrument consisting of a pair of hollow pieces of wood or bone (usually held between the thumb and fingers) that are made to click together (as by Spanish dancers) in rhythm with the dance | Synonyms: castanets, clappers, finger cymbals |
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| boneset | (noun) perennial herb of southeastern United States having white-rayed flower heads; formerly used as in folk medicine | Synonyms: agueweed, Eupatorium perfoliatum, thoroughwort |
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| (noun) European herb having small white, pink or purple flowers; naturalized as a weed in North America | Synonyms: common comfrey, Symphytum officinale |
| bonesetter | (noun) someone (not necessarily a licensed physician) who sets broken bones | - |
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| boneshaker | (noun) any wheeled vehicle that is dilapidated and uncomfortable | - |
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| brachistochrone | (noun) a curve between two points along which a body can move under gravity in a shorter time than for any other curve. | - |
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| breakstone | (noun) any of various plants of the genus Saxifraga | Synonyms: rockfoil, saxifrage |
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| breastbone | (noun) the flat bone that articulates with the clavicles and the first seven pairs of ribs | Synonyms: sternum |
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| brimstone | (noun) an old name for sulfur | Synonyms: native sulfur, native sulphur |
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| brownstone | (noun) a row house built of brownstone; reddish brown in color | - |
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| (noun) a reddish brown sandstone; used in buildings | - |
| buffoonery | (noun) acting like a clown or buffoon | Synonyms: clowning, frivolity, harlequinade, japery, prank |
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| buspirone | (noun) a drug (trade name BuSpar) designed specifically for anxiety | Synonyms: BuSpar |
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| butanone | (noun) colorless soluble flammable liquid ketone used as a solvent for resins and as a paint remover and in lacquers and cements and adhesives and cleaning fluids and celluloid | Synonyms: methyl ethyl ketone |
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| bygone | (noun) past events to be put aside | Synonyms: water under the bridge |
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| cannoneer | (noun) a serviceman in the artillery | Synonyms: artilleryman, gunner, machine gunner |
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| capstone | (noun) a stone that forms the top of wall or building | Synonyms: copestone, coping stone, stretcher |
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| (noun) a final touch; a crowning achievement; a culmination | Synonyms: copestone, finishing touch |
| cefoperazone | (noun) a parenteral cephalosporin (trade name Cefobid) used for severe infections | Synonyms: Cefobid |
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| ceftriaxone | (noun) a parenteral cephalosporin (trade name Rocephin) used for severe infection of the lungs or throat or ears or urinary tract | Synonyms: Rocephin |
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| cellphone | (noun) a hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver | Synonyms: cell, cellular phone, cellular telephone, mobile phone |
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| chalkstone | (noun) a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout | Synonyms: tophus |
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| chaperone | (noun) one who accompanies and supervises a young woman or gatherings of young people | Synonyms: chaperon |
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| cheekbone | (noun) the arch of bone beneath the eye that forms the prominence of the cheek | Synonyms: jugal bone, malar, malar bone, os zygomaticum, zygomatic, zygomatic bone |
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| cherrystone | (noun) a half-grown quahog | Synonyms: cherrystone clam |
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| (noun) small quahog larger than a littleneck; eaten raw or cooked as in e.g. clams casino | Synonyms: cherrystone clam |
| chloroacetophenone | (noun) a tear gas that is weaker than CS gas but lasts longer | Synonyms: CN gas |
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| chlorthalidone | (noun) a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks | Synonyms: Hygroton, Thalidone |
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| chordophone | (noun) a stringed instrument of the group including harps, lutes, lyres, and zithers | - |
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| cicerone | (noun) a guide who conducts and informs sightseers | - |
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| claystone | (noun) fine-grained rock consisting of compacted clay particles | - |
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| clingstone | (noun) fruit (especially peach) whose flesh adheres strongly to the pit | Synonyms: cling |
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| clone | (noun) an unauthorized copy or imitation | Synonyms: knockoff |
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| (noun) a group of genetically identical cells or organisms derived from a single cell or individual by some kind of asexual reproduction | Synonyms: clon |
| (noun) a person who is almost identical to another | Synonyms: dead ringer, ringer |
| cobblestone | (noun) rectangular paving stone with curved top; once used to make roads | Synonyms: cobble, sett |
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| collarbone | (noun) bone linking the scapula and sternum | Synonyms: clavicle |
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| colonel | (noun) a commissioned military officer in the United States Army or Air Force or Marines who ranks above a lieutenant colonel and below a brigadier general | - |
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| commissioner | (noun) a government administrator | - |
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| (noun) a member of a commission | - |
| commoner | (noun) a person who holds no title | Synonyms: common man, common person |
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| component | (noun) an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system | Synonyms: constituent, element |
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| (noun) an abstract part of something | Synonyms: constituent, element, factor, ingredient |
| (noun) something determined in relation to something that includes it | Synonyms: component part, constituent, part, portion |
| concessioner | (noun) someone who holds or operates a concession | Synonyms: concessionaire |
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| conditioner | (noun) exercise that conditions the body | - |
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| (noun) a substance used in washing (clothing or hair) to make things softer | - |
| (noun) a trainer of athletes | - |
| cone | (noun) any cone-shaped artifact | - |
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| (noun) a visual receptor cell in the retina that is sensitive to bright light and to color | Synonyms: cone cell, retinal cone |
| (noun) cone-shaped mass of ovule- or spore-bearing scales or bracts | Synonyms: strobile, strobilus |
| (noun) a shape whose base is a circle and whose sides taper up to a point | Synonyms: cone shape, conoid |
| coneflower | (noun) any of various perennials of the eastern United States having thick rough leaves and long-stalked showy flowers with drooping rays and a conelike center | - |
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| (noun) any of various plants of the genus Rudbeckia cultivated for their large usually yellow daisies with prominent central cones | - |
| (noun) a wildflower of the genus Ratibida | - |
| conenose | (noun) large bloodsucking bug | Synonyms: big bedbug, cone-nosed bug, conenose bug, kissing bug |
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| conessi | (noun) tropical Asian tree with hard white wood and bark formerly used as a remedy for dysentery and diarrhea | Synonyms: Holarrhena antidysenterica, Holarrhena pubescens, ivory tree, kurchee, kurchi |
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| coney | (noun) black-spotted usually dusky-colored fish with reddish fins | Synonyms: Epinephelus fulvus |
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| (noun) any of various burrowing animals of the family Leporidae having long ears and short tails; some domesticated and raised for pets or food | Synonyms: cony, rabbit |
| (noun) small short-eared burrowing mammal of rocky uplands of Asia and western North America | Synonyms: cony, mouse hare, pika, rock rabbit |
| (noun) any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes | Synonyms: cony, das, dassie, hyrax |
| confectioner | (noun) someone who makes candies and other sweets | Synonyms: candymaker |
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| confectionery | (noun) the occupation and skills of a confectioner | - |
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| (noun) a confectioner's shop | Synonyms: candy store, confectionary |
| (noun) candy and other sweets considered collectively | - |
| conventioneer | (noun) someone who attends a convention | - |
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| copestone | (noun) a stone that forms the top of wall or building | Synonyms: capstone, coping stone, stretcher |
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| (noun) a final touch; a crowning achievement; a culmination | Synonyms: capstone, finishing touch |
| cornerstone | (noun) a stone at the outer corner of two intersecting masonry walls | - |
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| (noun) a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies | - |
| (noun) the fundamental assumptions from which something is begun or developed or calculated or explained | Synonyms: base, basis, foundation, fundament, groundwork |
| cornpone | (noun) cornbread often made without milk or eggs and baked or fried (southern) | Synonyms: pone |
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| coroner | (noun) a public official who investigates by inquest any death not due to natural causes | Synonyms: medical examiner |
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| coronet | (noun) margin between the skin of the pastern and the horn of the hoof | - |
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| (noun) a small crown; usually indicates a high rank but below that of sovereign | - |
| corticosterone | (noun) secreted by the adrenal cortex; involved in regulating water and electrolyte balance in the body | - |
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| cortisone | (noun) a corticosteroid hormone (trade name Cortone Acetate) normally produced by the adrenal cortex; is converted to hydrocortisone | Synonyms: Cortone Acetate |
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| cotoneaster | (noun) any shrub of the genus Cotoneaster: erect or creeping shrubs having richly colored autumn foliage and many small white to pinkish flowers followed by tiny red or black fruits | - |
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| coumarone | (noun) a colorless oily compound extracted from coal tar and used in manufacturing synthetic resins | Synonyms: benzofuran, cumarone |
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| crone | (noun) an ugly evil-looking old woman | Synonyms: beldam, beldame, hag, witch |
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| crooner | (noun) a singer of popular ballads | Synonyms: balladeer |
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