| decongestant | (noun) a drug that decreases pulmonary congestion | - |
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| decoupage | (noun) the art of decorating a surface with shapes or pictures and then coating it with varnish or lacquer | - |
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| (noun) art produced by decorating a surface with cutouts and then coating it with several layers of varnish or lacquer | - |
| degeneracy | (noun) moral perversion; impairment of virtue and moral principles | Synonyms: corruption, depravation, depravity, putrefaction |
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| (noun) the state of being degenerate in mental or moral qualities | Synonyms: decadence, decadency, degeneration |
| degenerate | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: deviant, deviate, perv, perve, pervert |
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| degeneration | (noun) passing from a more complex to a simpler biological form | Synonyms: retrogression |
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| (noun) the process of declining from a higher to a lower level of effective power or vitality or essential quality | Synonyms: devolution |
| (noun) the state of being degenerate in mental or moral qualities | Synonyms: decadence, decadency, degeneracy |
| deluge | (noun) a heavy rain | Synonyms: cloudburst, downpour, pelter, soaker, torrent, waterspout |
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| (noun) the rising of a body of water and its overflowing onto normally dry land | Synonyms: alluvion, flood, inundation |
| (noun) an overwhelming number or amount | Synonyms: flood, inundation, torrent |
| demiurge | (noun) a subordinate deity, in some philosophies the creator of the universe | - |
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| demurrage | (noun) detention of a ship or freight car or other cargo beyond its scheduled time of departure | - |
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| (noun) a charge required as compensation for the delay of a ship or freight car or other cargo beyond its scheduled time of departure | - |
| derangement | (noun) the act of disturbing the mind or body | Synonyms: overthrow, upset |
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| (noun) a state of mental disturbance and disorientation | Synonyms: mental unsoundness, unbalance |
| derringer | (noun) a pocket pistol of large caliber with a short barrel | - |
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| detergence | (noun) detergent quality; the quality of having cleansing power | Synonyms: detergency |
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| detergency | (noun) detergent quality; the quality of having cleansing power | Synonyms: detergence |
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| detergent | (noun) a cleansing agent that differs from soap but can also emulsify oils and hold dirt in suspension | - |
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| (noun) a surface-active chemical widely used in industry and laundering | - |
| digenesis | (noun) alternation of sexual and asexual generations | Synonyms: metagenesis |
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| digest | (noun) something that is compiled (as into a single book or file) | Synonyms: compilation |
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| (noun) a periodical that summarizes the news | - |
| digester | (noun) autoclave consisting of a vessel in which plant or animal materials are digested | - |
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| digestibility | (noun) the property of being easy to digest | Synonyms: digestibleness |
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| digestibleness | (noun) the property of being easy to digest | Synonyms: digestibility |
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| digestion | (noun) learning and coming to understand ideas and information | - |
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| (noun) the organic process by which food is converted into substances that can be absorbed into the body | - |
| (noun) the process of decomposing organic matter (as in sewage) by bacteria or by chemical action or heat | - |
| digestive | (noun) any substance that promotes digestion | - |
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| digger | (noun) a machine for excavating | Synonyms: excavator, power shovel, shovel |
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| (noun) a laborer who digs | - |
| diligence | (noun) a diligent effort | Synonyms: application |
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| (noun) persevering determination to perform a task | Synonyms: industriousness, industry |
| (noun) conscientiousness in paying proper attention to a task; giving the degree of care required in a given situation | - |
| dinge | (noun) discoloration due to dirtiness | Synonyms: dinginess |
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| dinoflagellate | (noun) chiefly marine protozoa having two flagella; a chief constituent of plankton | - |
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| dirge | (noun) a song or hymn of mourning composed or performed as a memorial to a dead person | Synonyms: coronach, lament, requiem, threnody |
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| disadvantage | (noun) the quality of having an inferior or less favorable position | - |
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| disarrangement | (noun) a condition in which an orderly system has been disrupted | Synonyms: disorganisation, disorganization |
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| discharge | (noun) the act of discharging a gun | Synonyms: firing, firing off |
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| (noun) the termination of someone's employment (leaving them free to depart) | Synonyms: dismissal, dismission, firing, liberation, release, sack, sacking |
| (noun) a formal written statement of relinquishment | Synonyms: release, waiver |
| (noun) the act of venting | Synonyms: venting |
| (noun) the sudden giving off of energy | - |
| (noun) the pouring forth of a fluid | Synonyms: outpouring, run |
| (noun) electrical conduction through a gas in an applied electric field | Synonyms: arc, electric arc, electric discharge, spark |
| (noun) any of several bodily processes by which substances go out of the body | Synonyms: emission, expelling |
| (noun) a substance that is emitted or released | Synonyms: emission |
| discouragement | (noun) the act of discouraging | - |
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| (noun) the expression of opposition and disapproval | - |
| (noun) the feeling of despair in the face of obstacles | Synonyms: disheartenment, dismay |
| disengagement | (noun) to break off a military action with an enemy | Synonyms: fallback, pullout |
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| (noun) the act of releasing from an attachment or connection | Synonyms: detachment |
| disgorgement | (noun) the reflex act of ejecting the contents of the stomach through the mouth | Synonyms: emesis, puking, regurgitation, vomit, vomiting |
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| disingenuousness | (noun) the quality of being disingenuous and lacking candor | - |
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| dislodgement | (noun) forced removal from a position of advantage | Synonyms: dislodgment |
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| disparagement | (noun) the act of speaking contemptuously of | Synonyms: dispraise |
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| (noun) a communication that belittles somebody or something | Synonyms: depreciation, derogation |
| disparager | (noun) one who disparages or belittles the worth of something | Synonyms: depreciator, detractor, knocker |
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| divergence | (noun) the act of moving away in different direction from a common point | Synonyms: divergency |
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| (noun) a difference between conflicting facts or claims or opinions | Synonyms: disagreement, discrepancy, variance |
| (noun) an infinite series that has no limit | Synonyms: divergency |
| (noun) a variation that deviates from the standard or norm | Synonyms: departure, deviation, difference |
| divergency | (noun) the act of moving away in different direction from a common point | Synonyms: divergence |
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| (noun) an infinite series that has no limit | Synonyms: divergence |
| divulgement | (noun) the act of disclosing something that was secret or private | Synonyms: divulgence |
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| divulgence | (noun) the act of disclosing something that was secret or private | Synonyms: divulgement |
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| dockage | (noun) the act of securing an arriving vessel with ropes | Synonyms: docking, moorage, tying up |
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| (noun) landing in a harbor next to a pier where ships are loaded and unloaded or repaired; may have gates to let water in or out | Synonyms: dock, docking facility |
| (noun) a fee charged for a vessel to use a dock | Synonyms: docking fee |
| dodge | (noun) a quick evasive movement | - |
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| (noun) an elaborate or deceitful scheme contrived to deceive or evade | Synonyms: contrivance, stratagem |
| (noun) a statement that evades the question by cleverness or trickery | Synonyms: dodging, scheme |
| dodger | (noun) small oval cake of corn bread baked or fried (chiefly southern) | Synonyms: corn dab, corn dodger |
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| (noun) a shifty deceptive person | Synonyms: fox, slyboots |
| doge | (noun) formerly the chief magistrate in the republics of Venice and Genoa | - |
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| doggedness | (noun) persistent determination | Synonyms: perseverance, persistence, persistency, pertinacity, tenaciousness, tenacity |
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| doggerel | (noun) a comic verse of irregular measure | Synonyms: doggerel verse, jingle |
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| dojigger | (noun) something unspecified whose name is either forgotten or not known | Synonyms: doodad, doohickey, gimmick, gismo, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingmajig, thingumabob, thingumajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
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| doppelganger | (noun) a ghostly double of a living person that haunts its living counterpart | - |
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| dosage | (noun) a measured portion of medicine taken at any one time | Synonyms: dose |
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| (noun) the quantity of an active agent (substance or radiation) taken in or absorbed at any one time | Synonyms: dose |
| dotage | (noun) mental infirmity as a consequence of old age; sometimes shown by foolish infatuations | Synonyms: second childhood, senility |
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| dowager | (noun) a widow holding property received from her deceased husband | - |
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| downstage | (noun) the front half of the stage (as seen from the audience) | - |
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| dragee | (noun) pill that is a sugar-coated medicated candy | - |
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| (noun) sugar-coated nut or fruit piece | - |
| (noun) silvery candy beads used for decorating cakes | - |
| dragger | (noun) a fishing boat that uses a trawl net or dragnet to catch fish | Synonyms: trawler |
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| (noun) someone who pulls or tugs or drags in an effort to move something | Synonyms: puller, tugger |
| drainage | (noun) emptying something accomplished by allowing liquid to run out of it | Synonyms: drain |
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| drawbridge | (noun) a bridge that can be raised to block passage or to allow boats or ships to pass beneath it | Synonyms: lift bridge |
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| dredge | (noun) a power shovel to remove material from a channel or riverbed | - |
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| dredger | (noun) a barge (or a vessel resembling a barge) that is used for dredging | - |
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| dressage | (noun) maneuvers of a horse in response to body signals by the rider | - |
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| driftage | (noun) the deviation (by a vessel or aircraft) from its intended course due to drifting | - |
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| drippage | (noun) a liquid (as water) that flows in drops (as from the eaves of house) | Synonyms: dripping |
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| drudge | (noun) a laborer who is obliged to do menial work | Synonyms: galley slave, navvy, peon |
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| (noun) one who works hard at boring tasks | Synonyms: hack, hacker |
| drudgery | (noun) hard monotonous routine work | Synonyms: donkeywork, grind, plodding |
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| drugget | (noun) a rug made of a coarse fabric having a cotton warp and a wool filling | - |
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| dudgeon | (noun) a feeling of intense indignation (now used only in the phrase `in high dudgeon') | Synonyms: high dudgeon |
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| dungeon | (noun) the main tower within the walls of a medieval castle or fortress | Synonyms: donjon, keep |
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| (noun) a dark cell (usually underground) where prisoners can be confined | - |
| dysgenesis | (noun) infertility between hybrids | - |
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| dysgenics | (noun) the study of the operation of factors causing degeneration in the type of offspring produced | Synonyms: cacogenics |
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| dziggetai | (noun) Mongolian wild ass | Synonyms: chigetai, Equus hemionus hemionus |
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| eager | (noun) a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | Synonyms: aegir, bore, eagre, tidal bore |
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| eagerness | (noun) prompt willingness | Synonyms: forwardness, readiness, zeal |
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| (noun) a positive feeling of wanting to push ahead with something | Synonyms: avidity, avidness, keenness |
| eatage | (noun) bulky food like grass or hay for browsing or grazing horses or cattle | Synonyms: forage, grass, pasturage, pasture |
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| edge | (noun) a sharp side formed by the intersection of two surfaces of an object | - |
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| (noun) the outside limit of an object or area or surface; a place farthest away from the center of something | - |
| (noun) a slight competitive advantage | - |
| (noun) the attribute of urgency in tone of voice | Synonyms: sharpness |
| (noun) the boundary of a surface | Synonyms: border |
| (noun) a line determining the limits of an area | Synonyms: bound, boundary |
| edger | (noun) garden tool for cutting grass around the edges of a yard | - |
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| (noun) a person who puts finishing edges on a garment | - |
| effleurage | (noun) a rhythmic stroking | - |
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| effulgence | (noun) the quality of being bright and sending out rays of light | Synonyms: radiance, radiancy, refulgence, refulgency, shine |
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| egger | (noun) moth having nonfunctional mouthparts as adults; larvae feed on tree foliage and spin egg-shaped cocoons | Synonyms: eggar |
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| eigenvalue | (noun) (mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant | Synonyms: characteristic root of a square matrix, eigenvalue of a matrix, eigenvalue of a square matrix |
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| eisegesis | (noun) personal interpretation of a text (especially of the Bible) using your own ideas | - |
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| electrosurgery | (noun) surgery performed with electrical devices (as in electrocautery) | - |
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| emergence | (noun) the act of coming (or going) out; becoming apparent | Synonyms: egress, egression |
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| (noun) the act of emerging | Synonyms: emersion |
| (noun) the becoming visible | Synonyms: egress, issue |
| (noun) the gradual beginning or coming forth | Synonyms: growth, outgrowth |
| emergency | (noun) a brake operated by hand; usually operates by mechanical linkage | Synonyms: emergency brake, hand brake, parking brake |
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| (noun) a sudden unforeseen crisis (usually involving danger) that requires immediate action | Synonyms: exigency, pinch |
| (noun) a state in which martial law applies | - |
| empennage | (noun) the rear part of an aircraft | Synonyms: tail, tail assembly |
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| enallage | (noun) a substitution of part of speech or gender or number or tense etc. (e.g., editorial `we' for `I') | - |
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| encouragement | (noun) the act of giving hope or support to someone | Synonyms: boost |
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| (noun) the expression of approval and support | - |
| (noun) the feeling of being encouraged | - |
| endangerment | (noun) a source of danger; a possibility of incurring loss or misfortune | Synonyms: hazard, jeopardy, peril, risk |
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| endogen | (noun) a monocotyledonous flowering plant; the stem grows by deposits on its inside | Synonyms: liliopsid, monocot, monocotyledon |
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| endogeny | (noun) a geological phenomenon below the surface of the earth | - |
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| energetism | (noun) the philosophical theory that energy is the substrate of all phenomena and that all observable changes can be interpreted as transformations of one kind of energy into another. | Synonyms: energetic monism |
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| engagement | (noun) the act of sharing in the activities of a group | Synonyms: involution, involvement, participation |
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| (noun) a hostile meeting of opposing military forces in the course of a war | Synonyms: battle, conflict, fight |
| (noun) the act of giving someone a job | Synonyms: employment |
| (noun) employment for performers or performing groups that lasts for a limited period of time | Synonyms: booking |
| (noun) a mutual promise to marry | Synonyms: betrothal, troth |
| (noun) contact by fitting together | Synonyms: interlocking, mesh, meshing |
| (noun) a meeting arranged in advance | Synonyms: appointment, date |
| engelmannia | (noun) common erect hairy perennial of plains and prairies of southern and central United States having flowers that resemble sunflowers | - |
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| engorgement | (noun) eating ravenously or voraciously to satiation | - |
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| (noun) congestion with blood | - |
| enlargement | (noun) the act of increasing (something) in size or volume or quantity or scope | Synonyms: expansion |
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| (noun) a photographic print that has been enlarged | Synonyms: blowup, magnification |
| (noun) a discussion that provides additional information | Synonyms: elaboration, expansion |
| (noun) the state of being enlarged | - |
| enlarger | (noun) photographic equipment consisting of an optical projector used to enlarge a photograph | - |
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| enragement | (noun) a feeling of intense anger and impatience | Synonyms: infuriation |
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| ensilage | (noun) fodder harvested while green and kept succulent by partial fermentation as in a silo | Synonyms: silage |
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| entourage | (noun) the group following and attending to some important person | Synonyms: cortege, retinue, suite |
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| epigenesis | (noun) a geological change in the mineral content of rock after the rock has formed | - |
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| equipage | (noun) a vehicle with wheels drawn by one or more horses | Synonyms: carriage, rig |
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| (noun) equipment and supplies of a military force | Synonyms: materiel |
| espionage | (noun) the systematic use of spies to get military or political secrets | - |
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| estrangement | (noun) the feeling of being alienated from other people | Synonyms: alienation, disaffection |
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| (noun) separation resulting from hostility | Synonyms: alienation |