| debt | (noun) an obligation to pay or do something | - |
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| (noun) money or goods or services owed by one person to another | - |
| (noun) the state of owing something (especially money) | - |
| debut | (noun) the act of beginning something new | Synonyms: entry, first appearance, introduction, launching, unveiling |
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| (noun) the presentation of a debutante in society | - |
| decadent | (noun) a person who has fallen into a decadent state (morally or artistically) | - |
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| decampment | (noun) breaking camp | - |
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| (noun) the act of running away secretly (as to avoid arrest) | Synonyms: abscondment |
| decedent | (noun) someone who is no longer alive | Synonyms: dead person, dead soul, deceased, deceased person, departed |
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| deceit | (noun) the act of deceiving | Synonyms: deception, dissembling, dissimulation |
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| (noun) the quality of being fraudulent | Synonyms: fraudulence |
| (noun) a misleading falsehood | Synonyms: deception, misrepresentation |
| decipherment | (noun) the activity of making clear or converting from code into plain text | Synonyms: decoding, decryption |
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| decoagulant | (noun) medicine that prevents or retards the clotting of blood | Synonyms: anticoagulant, anticoagulant medication |
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| decongestant | (noun) a drug that decreases pulmonary congestion | - |
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| decrement | (noun) the amount by which something decreases | Synonyms: decrease |
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| (noun) a process of becoming smaller or shorter | Synonyms: decrease |
| defacement | (noun) the act of damaging the appearance or surface of something | Synonyms: disfiguration, disfigurement, mutilation |
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| default | (noun) loss due to not showing up | - |
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| (noun) an option that is selected automatically unless an alternative is specified | Synonyms: default option |
| (noun) loss resulting from failure of a debt to be paid | Synonyms: nonpayment, nonremittal |
| (noun) act of failing to meet a financial obligation | Synonyms: nonpayment, nonremittal |
| defeat | (noun) an unsuccessful ending to a struggle or contest | Synonyms: licking |
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| (noun) the feeling that accompanies an experience of being thwarted in attaining your goals | Synonyms: frustration |
| defeatist | (noun) someone who is resigned to defeat without offering positive suggestions | Synonyms: negativist |
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| defect | (noun) a mark or flaw that spoils the appearance of something (especially on a person's body) | Synonyms: blemish, mar |
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| (noun) a failing or deficiency | Synonyms: shortcoming |
| (noun) an imperfection in an object or machine | Synonyms: fault, flaw |
| (noun) an imperfection in a bodily system | - |
| defendant | (noun) a person or institution against whom an action is brought in a court of law; the person being sued or accused | Synonyms: suspect |
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| deferment | (noun) act of putting off to a future time | Synonyms: deferral, postponement |
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| deficit | (noun) the property of being an amount by which something is less than expected or required | Synonyms: shortage, shortfall |
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| (noun) an excess of liabilities over assets (usually over a certain period) | - |
| (noun) (sports) the score by which a team or individual is losing | - |
| (noun) a deficiency or failure in neurological or mental functioning | - |
| defilement | (noun) the state of being polluted | Synonyms: befoulment, pollution |
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| defoliant | (noun) a chemical that is sprayed on plants and causes their leaves to fall off | - |
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| defrayment | (noun) the act of paying money | Synonyms: defrayal, payment |
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| deipnosophist | (noun) someone skilled at informal chitchat | - |
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| deist | (noun) a person who believes that God created the universe and then abandoned it | - |
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| delft | (noun) a style of glazed earthenware; usually white with blue decoration | - |
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| delight | (noun) something or someone that provides a source of happiness | Synonyms: joy, pleasure |
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| (noun) a feeling of extreme pleasure or satisfaction | Synonyms: delectation |
| delinquent | (noun) a young offender | Synonyms: juvenile delinquent |
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| demerit | (noun) the quality of being inadequate or falling short of perfection | Synonyms: fault |
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| (noun) a mark against a person for misconduct or failure; usually given in school or armed forces | - |
| democrat | (noun) an advocate of democratic principles | - |
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| demographist | (noun) a scientist who studies the growth and density of populations and their vital statistics | Synonyms: demographer, population scientist |
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| demulcent | (noun) a medication (in the form of an oil or salve etc.) that soothes inflamed or injured skin | - |
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| denaturant | (noun) any substance that serves as a denaturing agent | - |
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| denouement | (noun) the final resolution of the main complication of a literary or dramatic work | - |
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| (noun) the outcome of a complex sequence of events | - |
| denouncement | (noun) a public act of denouncing | Synonyms: denunciation |
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| dent | (noun) an impression in a surface (as made by a blow) | Synonyms: ding, gouge, nick |
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| (noun) an appreciable consequence (especially a lessening) | - |
| (noun) a depression scratched or carved into a surface | Synonyms: incision, prick, scratch, slit |
| dentist | (noun) a person qualified to practice dentistry | Synonyms: dental practitioner, tooth doctor |
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| denturist | (noun) someone who makes dental appliances (bridges and dentures) | Synonyms: dental technician |
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| deodorant | (noun) a toiletry applied to the skin in order to mask unpleasant odors | Synonyms: deodourant |
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| deodourant | (noun) a toiletry applied to the skin in order to mask unpleasant odors | Synonyms: deodorant |
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| department | (noun) a specialized sphere of knowledge | - |
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| (noun) a specialized division of a large organization | Synonyms: section |
| (noun) the territorial and administrative division of some countries (such as France) | - |
| dependant | (noun) a person who relies on another person for support (especially financial support) | Synonyms: dependent |
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| dependent | (noun) a person who relies on another person for support (especially financial support) | Synonyms: dependant |
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| deployment | (noun) the distribution of forces in preparation for battle or work | - |
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| deponent | (noun) a person who testifies or gives a deposition | Synonyms: deposer, testifier |
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| deportment | (noun) (behavioral attributes) the way a person behaves toward other people | Synonyms: behavior, behaviour, conduct, demeanor, demeanour |
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| deposit | (noun) the act of putting something somewhere | Synonyms: deposition |
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| (noun) a facility where things can be deposited for storage or safekeeping | Synonyms: depositary, depository, repository |
| (noun) a payment given as a guarantee that an obligation will be met | - |
| (noun) matter that has been deposited by some natural process | Synonyms: sediment |
| (noun) the phenomenon of sediment or gravel accumulating | Synonyms: alluviation, sedimentation |
| (noun) a partial payment made at the time of purchase; the balance to be paid later | Synonyms: down payment |
| (noun) money deposited in a bank or some similar institution | Synonyms: bank deposit |
| (noun) money given as security for an article acquired for temporary use | - |
| (noun) the natural process of laying down a deposit of something | Synonyms: deposition |
| depot | (noun) station where transport vehicles load or unload passengers or goods | Synonyms: terminal, terminus |
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| (noun) a depository for goods | Synonyms: entrepot, storage, store, storehouse |
| depressant | (noun) a drug that reduces excitability and calms a person | Synonyms: downer, sedative, sedative drug |
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| derailment | (noun) an accident in which a train runs off its track | - |
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| 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 |
| derelict | (noun) a ship abandoned on the high seas | Synonyms: abandoned ship |
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| (noun) a person without a home, job, or property | - |
| dermatologist | (noun) a doctor who specializes in the physiology and pathology of the skin | Synonyms: skin doctor |
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| descant | (noun) a decorative musical accompaniment (often improvised) added above a basic melody | Synonyms: discant |
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| descendant | (noun) a person considered as descended from some ancestor | Synonyms: descendent |
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| descendent | (noun) a person considered as descended from some ancestor | Synonyms: descendant |
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| descent | (noun) the act of changing your location in a downward direction | - |
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| (noun) properties attributable to your ancestry | Synonyms: extraction, origin |
| (noun) a movement downward | - |
| (noun) the hereditary derivation of an individual | Synonyms: ancestry, blood, blood line, bloodline, line, line of descent, lineage, origin, parentage, pedigree, stemma, stock |
| (noun) a downward slope or bend | Synonyms: declension, declination, decline, declivity, downslope, fall |
| (noun) the kinship relation between an individual and the individual's progenitors | Synonyms: filiation, line of descent, lineage |
| desert | (noun) arid land with little or no vegetation | - |
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| (noun) (usually plural) a person's deservingness of or entitlement to reward or punishment | - |
| desiccant | (noun) a substance that promotes drying (e.g., calcium oxide absorbs water and is used to remove moisture) | Synonyms: drier, drying agent, siccative |
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| despoilment | (noun) the act of stripping and taking by force | Synonyms: despoilation, despoliation, spoil, spoilation, spoliation |
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| despot | (noun) a cruel and oppressive dictator | Synonyms: autocrat, tyrant |
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| dessert | (noun) a dish served as the last course of a meal | Synonyms: afters, sweet |
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| detachment | (noun) the act of releasing from an attachment or connection | Synonyms: disengagement |
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| (noun) coming apart | Synonyms: breakup, separation |
| (noun) avoiding emotional involvement | Synonyms: withdrawal |
| (noun) a small unit of troops of special composition | - |
| (noun) the state of being isolated or detached | Synonyms: insularism, insularity, insulation |
| detainment | (noun) a state of being confined (usually for a short time) | Synonyms: custody, detention, hold |
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| detent | (noun) a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward | Synonyms: click, dog, pawl |
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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 | - |
| determent | (noun) a communication that makes you afraid to try something | Synonyms: deterrence, intimidation |
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| determinant | (noun) a determining or causal element or factor | Synonyms: causal factor, determinative, determiner, determining factor |
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| (noun) a square matrix used to solve simultaneous equations | - |
| (noun) the site on the surface of an antigen molecule to which an antibody attaches itself | Synonyms: antigenic determinant, epitope |
| determinist | (noun) anyone who submits to the belief that they are powerless to change their destiny | Synonyms: fatalist, predestinarian, predestinationist |
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| deterrent | (noun) something immaterial that interferes with or delays action or progress | Synonyms: balk, baulk, check, handicap, hinderance, hindrance, impediment |
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| dethronement | (noun) the act of deposing someone; removing a powerful person from a position or office | Synonyms: deposition |
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| detriment | (noun) a damage or loss | Synonyms: hurt |
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| development | (noun) act of improving by expanding or enlarging or refining | - |
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| (noun) the act of making some area of land or water more profitable or productive or useful | Synonyms: exploitation |
| (noun) (music) the section of a composition or movement (especially in sonata form) where the major musical themes are developed and elaborated | - |
| (noun) a recent event that has some relevance for the present situation | - |
| (noun) a district that has been developed to serve some purpose | - |
| (noun) processing a photosensitive material in order to make an image visible | Synonyms: developing |
| (noun) (biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level | Synonyms: growing, growth, maturation, ontogenesis, ontogeny |
| (noun) a process in which something passes by degrees to a different stage (especially a more advanced or mature stage) | Synonyms: evolution |
| (noun) a state in which things are improving; the result of developing (as in the early part of a game of chess) | - |
| deviant | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: degenerate, deviate, perv, perve, pervert |
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| deviationist | (noun) an ideological defector from the party line (especially from orthodox communism) | - |
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| devilment | (noun) reckless or malicious behavior that causes discomfort or annoyance in others | Synonyms: devilry, deviltry, mischief-making, mischief, mischievousness, rascality, roguery, roguishness, shenanigan |
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| devolvement | (noun) the delegation of authority (especially from a central to a regional government) | Synonyms: devolution |
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| diabolist | (noun) an adherent of Satan or Satanism | Synonyms: Satanist |
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| dialect | (noun) the usage or vocabulary that is characteristic of a specific group of people | Synonyms: accent, idiom |
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| diamagnet | (noun) a substance that exhibits diamagnetism | - |
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| diarist | (noun) someone who keeps a diary or journal | Synonyms: diary keeper, journalist |
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| dichromat | (noun) a person with any of the various forms of dichromacy | - |
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| dicot | (noun) flowering plant with two cotyledons; the stem grows by deposit on its outside | Synonyms: dicotyledon, exogen, magnoliopsid |
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| dicynodont | (noun) a kind of therapsid | - |
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| diddlyshit | (noun) a small worthless amount | Synonyms: diddley, diddly-shit, diddly-squat, diddly, diddlysquat, doodly-squat, jack, shit, squat |
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| diddlysquat | (noun) a small worthless amount | Synonyms: diddley, diddly-shit, diddly-squat, diddly, diddlyshit, doodly-squat, jack, shit, squat |
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| diet | (noun) the act of restricting your food intake (or your intake of particular foods) | Synonyms: dieting |
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| (noun) a prescribed selection of foods | - |
| (noun) the usual food and drink consumed by an organism (person or animal) | - |
| (noun) a legislative assembly in certain countries (e.g., Japan) | - |
| 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 | - |
| digit | (noun) a finger or toe in human beings or corresponding body part in other vertebrates | Synonyms: dactyl |
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| (noun) one of the elements that collectively form a system of numeration | Synonyms: figure |
| (noun) the length of breadth of a finger used as a linear measure | Synonyms: finger's breadth, finger, fingerbreadth |
| diluent | (noun) a diluting agent | Synonyms: dilutant, thinner |
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| dilutant | (noun) a diluting agent | Synonyms: diluent, thinner |
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| dimout | (noun) darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft) | Synonyms: blackout, brownout |
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| dimwit | (noun) a stupid incompetent person | Synonyms: doofus, half-wit, nitwit |
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| dingbat | (noun) a silly empty-headed person | - |
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| dint | (noun) interchangeable with `means' in the expression `by means of' | - |
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| diplomat | (noun) an official engaged in international negotiations | Synonyms: diplomatist |
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| (noun) a person who deals tactfully with others | - |
| diplomatist | (noun) an official engaged in international negotiations | Synonyms: diplomat |
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| dirt | (noun) disgraceful gossip about the private lives of other people | Synonyms: malicious gossip, scandal |
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| (noun) anything regarded as making something unclean | Synonyms: filth, grease, grime, grunge, soil, stain |
| (noun) the part of the earth's surface consisting of humus and disintegrated rock | Synonyms: soil |
| (noun) obscene terms for feces | Synonyms: crap, poop, shit, shite, turd |
| disablement | (noun) the condition of being unable to perform as a consequence of physical or mental unfitness | Synonyms: disability, handicap, impairment |
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| disagreement | (noun) a difference between conflicting facts or claims or opinions | Synonyms: discrepancy, divergence, variance |
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| (noun) the speech act of disagreeing or arguing or disputing | - |
| (noun) a conflict of people's opinions or actions or characters | Synonyms: dissension, dissonance |
| disappointment | (noun) an act (or failure to act) that disappoints someone | Synonyms: dashing hopes |
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| (noun) a feeling of dissatisfaction that results when your expectations are not realized | Synonyms: letdown |
| disarmament | (noun) act of reducing or depriving of arms | Synonyms: disarming |
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