| aerospace | (noun) the atmosphere and outer space considered as a whole | - |
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| airspace | (noun) the atmosphere above a nation that is deemed to be under its jurisdiction | - |
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| (noun) the space in the atmosphere immediately above the earth | Synonyms: air space |
| alpaca | (noun) domesticated llama with long silky fleece; believed to be a domesticated variety of the guanaco | Synonyms: Lama pacos |
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| (noun) a thin glossy fabric made of the wool of the Lama pacos, or made of a rayon or cotton imitation of that wool | - |
| (noun) wool of the alpaca | - |
| apace | (adverb) with speed | Synonyms: chop-chop, in short order, quickly, rapidly, speedily |
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| (adverb) (poetic, literary) quickly | - |
| apache | (noun) a Parisian gangster | - |
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| backpack | (noun) a bag carried by a strap on your back or shoulder | Synonyms: back pack, haversack, knapsack, packsack, rucksack |
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| (verb) hike with a backpack | Synonyms: pack |
| backpacker | (noun) a hiker who wears a backpack | Synonyms: packer |
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| backpacking | (noun) carrying something in a pack on the back | Synonyms: packing |
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| backspace | (noun) the typewriter key used for back spacing | Synonyms: backspace key, backspacer |
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| (verb) hit the backspace key on a computer or typewriter keyboard | - |
| backspacer | (noun) the typewriter key used for back spacing | Synonyms: backspace, backspace key |
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| calpac | (noun) a high-crowned black cap (usually made of felt or sheepskin) worn by men in Turkey and Iran and the Caucasus | Synonyms: calpack, kalpac |
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| calpack | (noun) a high-crowned black cap (usually made of felt or sheepskin) worn by men in Turkey and Iran and the Caucasus | Synonyms: calpac, kalpac |
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| capacious | (adjective) large in capacity | - |
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| capaciousness | (noun) spatial largeness and extensiveness (especially inside a building) | Synonyms: commodiousness, roominess, spaciousness |
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| (noun) intellectual breadth | Synonyms: roominess |
| capacitance | (noun) an electrical device characterized by its capacity to store an electric charge | Synonyms: capacitor, condenser, electrical condenser |
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| (noun) an electrical phenomenon whereby an electric charge is stored | Synonyms: capacity, electrical capacity |
| capacitate | (verb) make capable | - |
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| (verb) cause (spermatozoa) to undergo the physical changes necessary to fertilize an egg | - |
| (verb) make legally capable or qualify in law | - |
| capacitive | (adjective) of or relating to capacitance | - |
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| capacitor | (noun) an electrical device characterized by its capacity to store an electric charge | Synonyms: capacitance, condenser, electrical condenser |
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| capacity | (noun) the maximum production possible | - |
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| (noun) a specified function | - |
| (noun) capability to perform or produce | - |
| (noun) tolerance for alcohol | - |
| (noun) the power to learn or retain knowledge; in law, the ability to understand the facts and significance of your behavior | Synonyms: mental ability |
| (noun) an electrical phenomenon whereby an electric charge is stored | Synonyms: capacitance, electrical capacity |
| (noun) the amount that can be contained | Synonyms: content |
| (noun) (computer science) the amount of information (in bytes) that can be stored on a disk drive | - |
| (noun) the susceptibility of something to a particular treatment | Synonyms: capability |
| carapace | (noun) hard outer covering or case of certain organisms such as arthropods and turtles | Synonyms: cuticle, shell, shield |
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| compact | (adjective) closely and firmly united or packed together | - |
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| (adjective) briefly giving the gist of something | Synonyms: compendious, succinct, summary |
| (adjective) having a short and solid form or stature | Synonyms: heavyset, stocky, thick, thickset |
| (noun) a small cosmetics case with a mirror; to be carried in a woman's purse | Synonyms: powder compact |
| (noun) a small and economical car | Synonyms: compact car |
| (noun) a signed written agreement between two or more parties (nations) to perform some action | Synonyms: concordat, covenant |
| (verb) squeeze or press together | Synonyms: compress, constrict, contract, press, squeeze |
| (verb) compress into a wad | Synonyms: bundle, pack, wad |
| (verb) make more compact by or as if by pressing | Synonyms: compress, pack together |
| (verb) have the property of being packable or of compacting easily | Synonyms: pack |
| compaction | (noun) the act of crushing | Synonyms: crunch, crush |
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| (noun) an increase in the density of something | Synonyms: compression, concretion, densification |
| compactly | (adverb) taking up no more space than necessary | - |
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| (adverb) with concise and precise brevity; to the point | Synonyms: succinctly |
| (adverb) in a compact manner or state | - |
| compactness | (noun) the spatial property of being crowded together | Synonyms: concentration, denseness, density, tightness |
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| (noun) the consistency of a compact solid | - |
| copacetic | (adjective) completely satisfactory | Synonyms: copasetic, copesetic, copesettic |
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| crawlspace | (noun) low space beneath a floor of a building; gives workers access to wiring or plumbing | Synonyms: crawl space |
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| cyberspace | (noun) a computer network consisting of a worldwide network of computer networks that use the TCP/IP network protocols to facilitate data transmission and exchange | Synonyms: internet, net |
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| drupaceous | (adjective) of or related to a drupe | - |
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| epacris | (noun) any heathlike evergreen shrub of the genus Epacris grown for their showy and crowded spikes of small bell-shaped or tubular flowers | - |
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| episcopacy | (noun) the collective body of bishops | Synonyms: episcopate |
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| gazpacho | (noun) a soup made with chopped tomatoes and onions and cucumbers and peppers and herbs; served cold | - |
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| headspace | (noun) the volume left at the top of a filled container (bottle or jar or tin) before sealing | - |
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| impact | (noun) influencing strongly | Synonyms: encroachment, impingement |
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| (noun) the violent interaction of individuals or groups entering into combat | Synonyms: shock |
| (noun) the striking of one body against another | - |
| (noun) a forceful consequence; a strong effect | Synonyms: wallop |
| (verb) have an effect upon | Synonyms: affect, bear on, bear upon, touch, touch on |
| (verb) press or wedge together; pack together | - |
| impacted | (adjective) wedged or packed in together | Synonyms: wedged |
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| impaction | (noun) a sharp collision produced by striking or dashing against something | Synonyms: impingement |
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| (noun) a disorder in which a tooth is so crowded in its socket that it cannot erupt normally | Synonyms: impacted tooth |
| (noun) a disorder in which feces are impacted in the lower colon | - |
| (noun) the condition of being pressed closely together and firmly fixed | - |
| incapacitate | (verb) injure permanently | Synonyms: disable, handicap, invalid |
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| (verb) make unable to perform a certain action | Synonyms: disable, disenable |
| incapacitated | (adjective) lacking in or deprived of strength or power | Synonyms: helpless |
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| incapacitating | (adjective) that cripples or disables or incapacitates | Synonyms: crippling, disabling |
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| incapacity | (noun) lack of physical or natural qualifications | - |
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| (noun) lack of intellectual power | - |
| jampack | (verb) crowd or pack to capacity | Synonyms: chock up, cram, jam, ram, wad |
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| kalpac | (noun) a high-crowned black cap (usually made of felt or sheepskin) worn by men in Turkey and Iran and the Caucasus | Synonyms: calpac, calpack |
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| meatpacking | (noun) wholesale packaging of meat for future sale (including slaughtering and processing and distribution to retailers) | Synonyms: meat-packing business, meat packing |
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| mepacrine | (noun) a drug (trade name Atabrine) used to treat certain worm infestations and once used to treat malaria | Synonyms: Atabrine, quinacrine, quinacrine hydrochloride |
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| mishpachah | (noun) (Yiddish) the entire family network of relatives by blood or marriage (and sometimes close friends) | Synonyms: mishpocha |
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| opacification | (noun) the process of becoming cloudy or opaque | - |
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| opacify | (verb) become opaque | - |
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| (verb) make opaque | - |
| opacity | (noun) the quality of being opaque to a degree; the degree to which something reduces the passage of light | Synonyms: opaqueness |
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| (noun) incomprehensibility resulting from obscurity of meaning | Synonyms: opaqueness |
| (noun) the phenomenon of not permitting the passage of electromagnetic radiation | - |
| outpace | (verb) surpass in speed | - |
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| paca | (noun) large burrowing rodent of South America and Central America; highly esteemed as food | Synonyms: Cuniculus paca |
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| pace | (noun) a step in walking or running | Synonyms: stride, tread |
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| (noun) the relative speed of progress or change | Synonyms: rate |
| (noun) a unit of length equal to 3 feet; defined as 91.44 centimeters; originally taken to be the average length of a stride | Synonyms: yard |
| (noun) the distance covered by a step | Synonyms: footstep, step, stride |
| (noun) the rate of moving (especially walking or running) | Synonyms: gait |
| (noun) the rate of some repeating event | Synonyms: tempo |
| (verb) measure (distances) by pacing | Synonyms: step |
| (verb) regulate or set the pace of | - |
| (verb) walk with slow or fast paces | - |
| (verb) go at a pace | - |
| pacemaker | (noun) a horse used to set the pace in racing | Synonyms: pacer, pacesetter |
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| (noun) an implanted electronic device that takes over the function of the natural cardiac pacemaker | Synonyms: artificial pacemaker |
| (noun) a specialized bit of heart tissue that controls the heartbeat | Synonyms: cardiac pacemaker, SA node, sinoatrial node |
| (noun) a leading instance in its field | Synonyms: pacesetter |
| pacer | (noun) a horse trained to a special gait in which both feet on one side leave the ground together | - |
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| (noun) a horse used to set the pace in racing | Synonyms: pacemaker, pacesetter |
| pacesetter | (noun) a horse used to set the pace in racing | Synonyms: pacemaker, pacer |
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| (noun) a leading instance in its field | Synonyms: pacemaker |
| pacha | (noun) a civil or military authority in Turkey or Egypt | Synonyms: pasha |
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| pachinko | (noun) a Japanese pinball game played on a vertical board | - |
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| pachisi | (noun) an ancient board game resembling backgammon; played on a cross-shaped board | Synonyms: parchesi, parchisi |
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| pachouli | (noun) a heavy perfume made from the patchouli plant | Synonyms: patchouli, patchouly |
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| (noun) small East Indian shrubby mint; fragrant oil from its leaves is used in perfumes | Synonyms: patchouli, patchouly, Pogostemon cablin |
| pachuco | (noun) a Mexican-American teenager who belongs to a neighborhood gang and who dresses in showy clothes | - |
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| pachycephalosaur | (noun) bipedal herbivore having 10 inches of bone atop its head; largest boneheaded dinosaur ever found | Synonyms: pachycephalosaurus |
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| pachycephalosaurus | (noun) bipedal herbivore having 10 inches of bone atop its head; largest boneheaded dinosaur ever found | Synonyms: pachycephalosaur |
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| pachycheilia | (noun) an abnormal thickness of the lips | - |
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| pachyderm | (noun) any of various nonruminant hoofed mammals having very thick skin: elephant, rhinoceros, hippopotamus | - |
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| pachyderma | (noun) thickening of the skin (usually unilateral on an extremity) caused by congenital enlargement of lymph vessel and lymph vessel obstruction | Synonyms: nevoid elephantiasis |
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| pachydermal | (adjective) of or relating to or characteristic of pachyderms | Synonyms: pachydermatous, pachydermic, pachydermous |
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| pachydermatous | (adjective) of or relating to or characteristic of pachyderms | Synonyms: pachydermal, pachydermic, pachydermous |
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| (adjective) emotionally hardened | Synonyms: callous, indurate |
| pachydermic | (adjective) of or relating to or characteristic of pachyderms | Synonyms: pachydermal, pachydermatous, pachydermous |
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| pachydermous | (adjective) of or relating to or characteristic of pachyderms | Synonyms: pachydermal, pachydermatous, pachydermic |
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| pachysandra | (noun) any plant of the genus Pachysandra; low-growing evergreen herbs or subshrubs having dentate leaves and used as ground cover | - |
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| pachytene | (noun) the third stage of the prophase of meiosis | - |
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| pacific | (adjective) promoting peace | - |
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| (adjective) disposed to peace or of a peaceful nature | Synonyms: peaceable |
| pacifically | (adverb) in a peaceable manner | Synonyms: peaceably |
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| pacification | (noun) the act of appeasing someone or causing someone to be more favorably inclined | Synonyms: mollification |
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| (noun) actions taken by a government to defeat insurgency | Synonyms: counterinsurgency |
| (noun) a treaty to cease hostilities | Synonyms: peace, peace treaty |
| pacificism | (noun) the doctrine that all violence is unjustifiable | Synonyms: pacifism, passivism |
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| (noun) the belief that all international disputes can be settled by arbitration | Synonyms: pacifism |
| pacificist | (noun) someone opposed to violence as a means of settling disputes | Synonyms: disarmer, pacifist |
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| pacifier | (noun) device used for an infant to suck or bite on | Synonyms: baby's dummy, comforter, teething ring |
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| (noun) anything that serves to pacify | - |
| (noun) someone who tries to bring peace | Synonyms: conciliator, make-peace, peacemaker, reconciler |
| pacifism | (noun) the doctrine that all violence is unjustifiable | Synonyms: pacificism, passivism |
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| (noun) the belief that all international disputes can be settled by arbitration | Synonyms: pacificism |
| pacifist | (adjective) opposed to war | Synonyms: dovish, pacifistic |
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| (noun) someone opposed to violence as a means of settling disputes | Synonyms: disarmer, pacificist |
| pacifistic | (adjective) opposed to war | Synonyms: dovish, pacifist |
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| pacifistically | (adverb) in a pacifistic manner | - |
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| pacify | (verb) fight violence and try to establish peace in (a location) | - |
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| (verb) cause to be more favorably inclined; gain the good will of | Synonyms: appease, assuage, conciliate, gentle, gruntle, lenify, mollify, placate |
| pacing | (noun) walking with slow regular strides | - |
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| (noun) (music) the speed at which a composition is to be played | Synonyms: tempo |
| pack | (noun) a convenient package or parcel (as of cigarettes or film) | - |
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| (noun) a bundle (especially one carried on the back) | - |
| (noun) a sheet or blanket (either dry or wet) to wrap around the body for its therapeutic effect | - |
| (noun) a cream that cleanses and tones the skin | Synonyms: face pack |
| (noun) a group of hunting animals | - |
| (noun) an exclusive circle of people with a common purpose | Synonyms: camp, clique, coterie, ingroup, inner circle |
| (noun) an association of criminals | Synonyms: gang, mob, ring |
| (noun) a complete collection of similar things | - |
| (noun) a large indefinite quantity | Synonyms: battalion, large number, multitude, plurality |
| (verb) treat the body or any part of it by wrapping it, as with blankets or sheets, and applying compresses to it, or stuffing it to provide cover, containment, or therapy, or to absorb blood | - |
| (verb) arrange in a container | - |
| (verb) load with a pack | Synonyms: load down |
| (verb) compress into a wad | Synonyms: bundle, compact, wad |
| (verb) seal with packing | - |
| (verb) press down tightly | Synonyms: tamp, tamp down |
| (verb) carry, as on one's back | - |
| (verb) have the property of being packable or of compacting easily | Synonyms: compact |
| (verb) press tightly together or cram | Synonyms: jam, mob, pile, throng |
| (verb) hike with a backpack | Synonyms: backpack |
| (verb) fill to capacity | - |
| (verb) set up a committee or legislative body with one's own supporters so as to influence the outcome | - |
| (verb) have with oneself; have on one's person | Synonyms: carry, take |
| packable | (adjective) capable of being packed | - |
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| package | (noun) a wrapped container | Synonyms: parcel |
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| (noun) (computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory | Synonyms: computer software, software, software package, software program, software system |
| (noun) a collection of things wrapped or boxed together | Synonyms: bundle, packet, parcel |
| (verb) put into a box | Synonyms: box |
| packaged | (adjective) enclosed in a package or protective covering | - |
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| packaging | (noun) the business of packing | - |
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| (noun) material used to make packages | - |
| (noun) a message issued in behalf of some product or cause or idea or person or institution | Synonyms: promo, promotion, promotional material, publicity |
| packed | (adjective) pressed together or compressed | - |
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| (adjective) extremely crowed or filled to capacity | Synonyms: jam-packed, jammed |
| packer | (noun) a workman employed to pack things into containers | Synonyms: bagger, boxer |
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| (noun) a wholesaler in the meat-packing business | Synonyms: meat packer |
| (noun) a hiker who wears a backpack | Synonyms: backpacker |
| packet | (noun) a small package or bundle | - |
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| (noun) a boat for carrying mail | Synonyms: mail boat, mailboat, packet boat |
| (noun) (computer science) a message or message fragment | - |
| (noun) a collection of things wrapped or boxed together | Synonyms: bundle, package, parcel |
| packhorse | (noun) a workhorse used as a pack animal | - |
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| packing | (noun) the enclosure of something in a package or box | Synonyms: boxing |
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| (noun) carrying something in a pack on the back | Synonyms: backpacking |
| (noun) any material used especially to protect something | Synonyms: packing material, wadding |
| packinghouse | (noun) a plant where livestock are slaughtered and processed and packed as meat products | Synonyms: packing plant |
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| (noun) a building where foodstuffs are processed and packed | - |
| packman | (noun) someone who travels about selling his wares (as on the streets or at carnivals) | Synonyms: hawker, peddler, pedlar, pitchman |
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| packrat | (noun) any of several bushy-tailed rodents of the genus Neotoma of western North America; hoards food and other objects | Synonyms: bushytail woodrat, Neotoma cinerea, pack rat, trade rat |
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| (noun) a collector of miscellaneous useless objects | - |
| packsack | (noun) a bag carried by a strap on your back or shoulder | Synonyms: back pack, backpack, haversack, knapsack, rucksack |
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| packsaddle | (noun) a saddle for pack animals to which loads can be attached | - |
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| packthread | (noun) a strong three-ply twine used to sew or tie packages | - |
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| pact | (noun) a written agreement between two states or sovereigns | Synonyms: accord, treaty |
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| paczki | (noun) A traditional Polish doughnut. | - |
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| papacy | (noun) the government of the Roman Catholic Church | Synonyms: pontificate |
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