| background | (noun) scenery hung at back of stage | Synonyms: backcloth, backdrop |
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| (noun) (computer science) the area of the screen in graphical user interfaces against which icons and windows appear | Synonyms: desktop, screen background |
| (noun) a person's social heritage: previous experience or training | - |
| (noun) the part of a scene (or picture) that lies behind objects in the foreground | Synonyms: ground |
| (noun) information that is essential to understanding a situation or problem | Synonyms: background knowledge |
| (noun) extraneous signals that can be confused with the phenomenon to be observed or measured | Synonyms: background signal |
| (noun) relatively unimportant or inconspicuous accompanying situation | - |
| (noun) the state of the environment in which a situation exists | Synonyms: scope, setting |
| battleground | (noun) a region where a battle is being (or has been) fought | Synonyms: battlefield, field, field of battle, field of honor |
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| bedground | (noun) an area on which a drove of cattle or sheep can sleep for a night | Synonyms: bed-ground, bed ground |
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| bloodhound | (noun) a breed of large powerful hound of European origin having very acute smell and used in tracking | Synonyms: sleuthhound |
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| boarhound | (noun) large hound used in hunting wild boars | - |
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| bound | (noun) a light, self-propelled movement upwards or forwards | Synonyms: bounce, leap, leaping, saltation, spring |
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| (noun) the greatest possible degree of something | Synonyms: boundary, limit |
| (noun) the line or plane indicating the limit or extent of something | Synonyms: boundary, bounds |
| (noun) a line determining the limits of an area | Synonyms: boundary, edge |
| campground | (noun) a site where people on holiday can pitch a tent | Synonyms: bivouac, camping area, camping ground, camping site, campsite, encampment |
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| compound | (noun) an enclosure of residences and other building (especially in the Orient) | - |
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| (noun) a whole formed by a union of two or more elements or parts | - |
| (noun) a word (as anthropology, kilocycle, builder) consisting of any of various combinations of words, combining forms, or affixes. | Synonyms: compound word |
| (noun) (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight | Synonyms: chemical compound |
| coonhound | (noun) any of several breeds of hound developed for hunting raccoons | - |
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| cummerbund | (noun) a broad pleated sash worn as formal dress with a tuxedo | - |
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| dachshund | (noun) small long-bodied short-legged German breed of dog having a short sleek coat and long drooping ears; suited for following game into burrows | Synonyms: badger dog, dachsie |
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| deerhound | (noun) very large and tall rough-coated dog bred for hunting deer; known as the royal dog of Scotland | Synonyms: Scottish deerhound |
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| elkhound | (noun) breed of compact medium-sized dog with a heavy grey coat developed in Norway for hunting elk | Synonyms: Norwegian elkhound |
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| fairground | (noun) an open area for holding fairs or exhibitions or circuses | - |
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| foreground | (noun) (computer science) a window for an active application | - |
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| (noun) the part of a scene that is near the viewer | - |
| found | (noun) food and lodging provided in addition to money | - |
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| foxhound | (noun) medium-sized glossy-coated hounds developed for hunting foxes | - |
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| fund | (noun) a financial institution that sells shares to individuals and invests in securities issued by other companies | Synonyms: investment company, investment firm, investment trust |
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| (noun) a reserve of money set aside for some purpose | Synonyms: monetary fund |
| (noun) a supply of something available for future use | Synonyms: stock, store |
| gerund | (noun) a noun formed from a verb (such as the `-ing' form of an English verb when used as a noun) | - |
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| greyhound | (noun) a tall slender dog of an ancient breed noted for swiftness and keen sight; used as a racing dog | - |
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| ground | (noun) the first or preliminary coat of paint or size applied to a surface | Synonyms: flat coat, primer, primer coat, priming, priming coat, undercoat |
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| (noun) (art) the surface (as a wall or canvas) prepared to take the paint for a painting | - |
| (noun) a connection between an electrical device and a large conducting body, such as the earth (which is taken to be at zero voltage) | Synonyms: earth |
| (noun) the part of a scene (or picture) that lies behind objects in the foreground | Synonyms: background |
| (noun) a relatively homogeneous percept extending back of the figure on which attention is focused | - |
| (noun) a position to be won or defended in battle (or as if in battle) | - |
| (noun) a rational motive for a belief or action | Synonyms: occasion, reason |
| (noun) the solid part of the earth's surface | Synonyms: dry land, earth, land, solid ground, terra firma |
| (noun) material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use) | Synonyms: land, soil |
| (noun) a relation that provides the foundation for something | Synonyms: basis, footing |
| (noun) the loose soft material that makes up a large part of the land surface | Synonyms: earth |
| hedgefund | (noun) a flexible investment company for a small number of large investors (usually the minimum investment is $1 million); can use high-risk techniques (not allowed for mutual funds) such as short-selling and heavy leveraging | Synonyms: hedge fund |
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| hellhound | (noun) a very evil man | - |
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| (noun) (Greek mythology) the three-headed dog guarding the entrance to Hades; son of Typhon | Synonyms: Cerberus |
| homebound | (noun) people who are confined to their homes | - |
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| horehound | (noun) a candy that is flavored with an extract of the horehound plant | - |
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| (noun) any of various aromatic herbs of the genus Marrubium | - |
| hound | (noun) any of several breeds of dog used for hunting typically having large drooping ears | Synonyms: hound dog |
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| (noun) someone who is morally reprehensible | Synonyms: blackguard, bounder, cad, dog, heel |
| iodocompound | (noun) a compound containing the covalent iodine radical | - |
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| maund | (noun) a unit of weight used in Asia; has different values in different countries | - |
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| mound | (noun) the position on a baseball team of the player who throws the ball for a batter to try to hit | Synonyms: pitcher |
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| (noun) structure consisting of an artificial heap or bank usually of earth or stones | Synonyms: hill |
| (noun) (baseball) the slight elevation on which the pitcher stands | Synonyms: hill, pitcher's mound |
| (noun) a collection of objects laid on top of each other | Synonyms: agglomerate, cumulation, cumulus, heap, pile |
| (noun) a small natural hill | Synonyms: hammock, hillock, hummock, knoll |
| osmund | (noun) any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters | Synonyms: flowering fern |
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| otterhound | (noun) hardy British hound having long pendulous ears and a thick coarse shaggy coat with an oily undercoat; bred for hunting otters | Synonyms: otter hound |
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| playground | (noun) yard consisting of an outdoor area for children's play | - |
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| (noun) an area where many people go for recreation, holidays or other purposes | Synonyms: resort area, vacation spot |
| pound | (noun) the act of pounding (delivering repeated heavy blows) | Synonyms: hammer, hammering, pounding |
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| (noun) a public enclosure for stray or unlicensed dogs | Synonyms: dog pound |
| (noun) a symbol for a unit of currency (especially for the pound sterling in Great Britain) | Synonyms: pound sign |
| (noun) a nontechnical unit of force equal to the mass of 1 pound with an acceleration of free fall equal to 32 feet/sec/sec | Synonyms: lbf. |
| (noun) the basic unit of money in Great Britain and Northern Ireland; equal to 100 pence | Synonyms: British pound, British pound sterling, pound sterling, quid |
| (noun) the basic unit of money in Cyprus; equal to 100 cents | Synonyms: Cypriot pound |
| (noun) the basic unit of money in Egypt; equal to 100 piasters | Synonyms: Egyptian pound |
| (noun) formerly the basic unit of money in Ireland; equal to 100 pence | Synonyms: Irish pound, Irish punt, punt |
| (noun) the basic unit of money in Lebanon; equal to 100 piasters | Synonyms: Lebanese pound |
| (noun) the basic unit of money in the Sudan; equal to 100 piasters | Synonyms: Sudanese pound |
| (noun) the basic unit of money in Syria; equal to 100 piasters | Synonyms: Syrian pound |
| (noun) 16 ounces avoirdupois | Synonyms: lb |
| (noun) a unit of apothecary weight equal to 12 ounces troy | - |
| rebound | (noun) the act of securing possession of the rebounding basketball after a missed shot | - |
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| (noun) a reaction to a crisis or setback or frustration | - |
| (noun) a movement back from an impact | Synonyms: backlash, recoil, repercussion |
| refund | (noun) the act of returning money received previously | Synonyms: repayment |
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| (noun) money returned to a payer | - |
| round | (noun) (often plural) a series of professional calls (usually in a set order) | - |
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| (noun) the usual activities in your day | Synonyms: daily round |
| (noun) the activity of playing 18 holes of golf | Synonyms: round of golf |
| (noun) any circular or rotating mechanism | Synonyms: circle |
| (noun) a charge of ammunition for a single shot | Synonyms: one shot, unit of ammunition |
| (noun) a crosspiece between the legs of a chair | Synonyms: rung, stave |
| (noun) a partsong in which voices follow each other; one voice starts and others join in one after another until all are singing different parts of the song at the same time | Synonyms: troll |
| (noun) an outburst of applause | - |
| (noun) a cut of beef between the rump and the lower leg | - |
| (noun) a serving to each of a group (usually alcoholic) | Synonyms: round of drinks |
| (noun) a regular route for a sentry or policeman | Synonyms: beat |
| (noun) the course along which communications spread | - |
| (noun) (sports) a division of a game during which one team is on the offensive | Synonyms: bout, turn |
| (noun) an interval during which a recurring sequence of events occurs | Synonyms: cycle, rhythm |
| sleuthhound | (noun) a breed of large powerful hound of European origin having very acute smell and used in tracking | Synonyms: bloodhound |
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| (noun) a detective who follows a trail | Synonyms: sleuth |
| smoothhound | (noun) smooth dogfish of European coastal waters | Synonyms: Mustelus mustelus, smoothhound shark |
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| sound | (noun) the particular auditory effect produced by a given cause | - |
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| (noun) the subjective sensation of hearing something | Synonyms: auditory sensation |
| (noun) the audible part of a transmitted signal | Synonyms: audio |
| (noun) (phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language | Synonyms: phone, speech sound |
| (noun) the sudden occurrence of an audible event | - |
| (noun) a large ocean inlet or deep bay | - |
| (noun) a narrow channel of the sea joining two larger bodies of water | Synonyms: strait |
| (noun) mechanical vibrations transmitted by an elastic medium | - |
| staghound | (noun) a large heavy hound formerly used in hunting stags and other large game; similar to but larger than a foxhound | - |
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| surround | (noun) the area in which something exists or lives | Synonyms: environment, environs, surroundings |
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| turnaround | (noun) turning in the opposite direction | Synonyms: reversal, reverse, reversion, turnabout |
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| (noun) act or process of unloading and loading and servicing a vessel or aircraft for a return trip | Synonyms: turnround |
| (noun) an area sufficiently large for a vehicle to turn around | - |
| (noun) a decision to reverse an earlier decision | Synonyms: change of mind, flip-flop, reversal, turnabout |
| (noun) time need to prepare a vessel or ship for a return trip | Synonyms: turnaround time |
| turnround | (noun) act or process of unloading and loading and servicing a vessel or aircraft for a return trip | Synonyms: turnaround |
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| ultrasound | (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs | Synonyms: echography, sonography, ultrasonography |
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| (noun) very high frequency sound; used in ultrasonography | - |
| underground | (noun) an electric railway operating below the surface of the ground (usually in a city) | Synonyms: metro, subway, subway system, tube |
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| (noun) a secret group organized to overthrow a government or occupation force | Synonyms: resistance |
| wolfhound | (noun) the largest breed of dogs; formerly used to hunt wolves | - |
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| wound | (noun) the act of inflicting a wound | Synonyms: wounding |
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| (noun) a casualty to military personnel resulting from combat | Synonyms: combat injury, injury |
| (noun) a figurative injury (to your feelings or pride) | - |
| (noun) an injury to living tissue (especially an injury involving a cut or break in the skin) | Synonyms: lesion |
| wraparound | (noun) a garment (as a dress or coat) with a full length opening; adjusts to the body by wrapping around | - |
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