| morals | (noun) motivation based on ideas of right and wrong | Synonyms: ethical motive, ethics, morality |
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| morangoska | (noun) a Portuguese variation of Caipirinha made using strawberries instead of lime. | - |
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| morass | (noun) a soft wet area of low-lying land that sinks underfoot | Synonyms: mire, quag, quagmire, slack |
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| moratorium | (noun) suspension of an ongoing activity | - |
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| (noun) a legally authorized postponement before some obligation must be discharged | - |
| moray | (noun) family of brightly colored voracious eels of warm coastal waters; generally nonaggressive to humans but larger species are dangerous if provoked | Synonyms: moray eel |
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| morbidity | (noun) the quality of being unhealthful and generally bad for you | Synonyms: morbidness, unwholesomeness |
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| (noun) an abnormally gloomy or unhealthy state of mind | Synonyms: morbidness |
| (noun) the relative incidence of a particular disease | - |
| morbidness | (noun) the quality of being unhealthful and generally bad for you | Synonyms: morbidity, unwholesomeness |
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| (noun) an abnormally gloomy or unhealthy state of mind | Synonyms: morbidity |
| morbilli | (noun) an acute and highly contagious viral disease marked by distinct red spots followed by a rash; occurs primarily in children | Synonyms: measles, rubeola |
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| morceau | (noun) a short literary or musical composition | - |
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| mordacity | (noun) a disposition to biting | - |
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| mordant | (noun) a substance used to treat leather or other materials before dyeing; aids in dyeing process | - |
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| moreen | (noun) a heavy fabric of wool (or wool and cotton) used mostly in upholstery or for curtains | - |
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| morel | (noun) any of various edible mushrooms of the genus Morchella having a brownish spongelike cap | - |
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| morello | (noun) cultivated sour cherry with dark-colored skin and juice | - |
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| (noun) any of several cultivated sour cherry trees bearing fruit with dark skin and juice | Synonyms: Prunus cerasus austera |
| mores | (noun) (sociology) the conventions that embody the fundamental values of a group | - |
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| morganite | (noun) a kind of pink beryl used as a gemstone | - |
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| morgen | (noun) a South African unit of measure equal to about 2 acres | - |
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| morgue | (noun) a building (or room) where dead bodies are kept before burial or cremation | Synonyms: dead room, mortuary |
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| morion | (noun) a metal helmet worn by common soldiers in the 16th century | Synonyms: cabasset |
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| morn | (noun) the time period between dawn and noon | Synonyms: forenoon, morning, morning time |
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| mornight | (noun) both morning and night, used when greeting someone | - |
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| morning | (noun) a conventional expression of greeting or farewell, used to wish someone a good morning | Synonyms: good morning |
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| (noun) the earliest period | Synonyms: dawn |
| (noun) the time period between dawn and noon | Synonyms: forenoon, morn, morning time |
| (noun) the first light of day | Synonyms: aurora, break of day, break of the day, cockcrow, dawn, dawning, daybreak, dayspring, first light, sunrise, sunup |
| morocco | (noun) a soft pebble-grained leather made from goatskin; used for shoes and book bindings etc. | - |
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| moron | (noun) a person of subnormal intelligence | Synonyms: changeling, cretin, half-wit, idiot, imbecile, retard |
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| moronity | (noun) mild mental retardation | Synonyms: mental deficiency |
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| moroseness | (noun) a sullen moody resentful disposition | Synonyms: sourness, sulkiness, sullenness |
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| (noun) a gloomy ill-tempered feeling | Synonyms: glumness, sullenness |
| morosoph | (noun) a learned fool | - |
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| morphallaxis | (noun) regeneration on a reduced scale of a body part; observed especially in invertebrates such as certain lobsters | - |
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| morphea | (noun) localized scleroderma | - |
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| morpheme | (noun) minimal meaningful language unit; it cannot be divided into smaller meaningful units | - |
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| morphia | (noun) an alkaloid narcotic drug extracted from opium; a powerful, habit-forming narcotic used to relieve pain | Synonyms: morphine |
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| morphine | (noun) an alkaloid narcotic drug extracted from opium; a powerful, habit-forming narcotic used to relieve pain | Synonyms: morphia |
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| morphogenesis | (noun) differentiation and growth of the structure of an organism (or a part of an organism) | - |
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| morphology | (noun) the branch of biology that deals with the structure of animals and plants | - |
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| (noun) studies of the rules for forming admissible words | - |
| (noun) the admissible arrangement of sounds in words | Synonyms: sound structure, syllable structure, word structure |
| (noun) the branch of geology that studies the characteristics and configuration and evolution of rocks and land forms | Synonyms: geomorphology |
| morphophoneme | (noun) (linguistics) the phonemes (or strings of phonemes) that constitute the various allomorphs of a morpheme | - |
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| morphophonemics | (noun) the study of the phonological realization of the allomorphs of the morphemes of a language | - |
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| morphophysiology | (noun) the study of anatomy in its relation to function | Synonyms: functional anatomy, physiological anatomy |
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| morrow | (noun) the next day | - |
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| morsel | (noun) a small amount of solid food; a mouthful | Synonyms: bit, bite |
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| (noun) a small quantity of anything | - |
| mortal | (noun) a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential | Synonyms: individual, person, somebody, someone, soul |
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| mortality | (noun) the quality or state of being mortal | - |
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| (noun) the ratio of deaths in an area to the population of that area; expressed per 1000 per year | Synonyms: death rate, deathrate, fatality rate, mortality rate |
| mortar | (noun) a muzzle-loading high-angle gun with a short barrel that fires shells at high elevations for a short range | Synonyms: howitzer, trench mortar |
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| (noun) a bowl-shaped vessel in which substances can be ground and mixed with a pestle | - |
| (noun) used as a bond in masonry or for covering a wall | - |
| mortarboard | (noun) an academic cap with a flat square with a tassel on top | - |
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| (noun) a square board with a handle underneath; used by masons to hold or carry mortar | Synonyms: hawk |
| mortgage | (noun) a conditional conveyance of property as security for the repayment of a loan | - |
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| mortgagee | (noun) the person who accepts a mortgage | Synonyms: mortgage holder |
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| mortgager | (noun) the person who gives a mortgage in return for money to be repaid | Synonyms: mortgagor |
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| mortgagor | (noun) the person who gives a mortgage in return for money to be repaid | Synonyms: mortgager |
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| mortice | (noun) a square hole made to receive a tenon and so to form a joint | Synonyms: mortise |
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| mortician | (noun) one whose business is the management of funerals | Synonyms: funeral director, funeral undertaker, undertaker |
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| mortification | (noun) (Christianity) the act of mortifying the lusts of the flesh by self-denial and privation (especially by bodily pain or discomfort inflicted on yourself) | - |
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| (noun) an instance in which you are caused to lose your prestige or self-respect | Synonyms: humiliation |
| (noun) strong feelings of embarrassment | Synonyms: chagrin, humiliation |
| (noun) the localized death of living cells (as from infection or the interruption of blood supply) | Synonyms: gangrene, necrosis, sphacelus |
| mortise | (noun) a square hole made to receive a tenon and so to form a joint | Synonyms: mortice |
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| mortmain | (noun) the oppressive influence of past events or decisions | Synonyms: dead hand, dead hand of the past |
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| (noun) real property held inalienably (as by an ecclesiastical corporation) | Synonyms: dead hand |
| mortuary | (noun) a building (or room) where dead bodies are kept before burial or cremation | Synonyms: dead room, morgue |
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| morula | (noun) a solid mass of blastomeres that forms when the zygote splits; develops into the blastula | - |
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| osmoreceptor | (noun) sensory end organ that responds to changes in osmotic pressure | - |
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| oxymoron | (noun) conjoining contradictory terms (as in `deafening silence') | - |
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| pleomorphism | (noun) (biology) the appearance of two or more distinctly different forms in the life cycle of some organisms | - |
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| (noun) (chemistry) the existence of different kinds of crystal of the same chemical compound | Synonyms: polymorphism |
| polymorph | (noun) an organism that can assume more than one adult form as in the castes of ants or termites | - |
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| polymorphism | (noun) (biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences) | - |
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| (noun) (chemistry) the existence of different kinds of crystal of the same chemical compound | Synonyms: pleomorphism |
| (noun) (genetics) the genetic variation within a population that natural selection can operate on | - |
| postmortem | (noun) an examination and dissection of a dead body to determine cause of death or the changes produced by disease | Synonyms: autopsy, necropsy, PM, post-mortem, post-mortem examination, postmortem examination |
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| (noun) discussion of an event after it has occurred | Synonyms: post-mortem |
| primordiality | (noun) The quality of being first, earliest or original. | - |
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| primordium | (noun) an organ in its earliest stage of development; the foundation for subsequent development | Synonyms: anlage |
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| pyromorphite | (noun) a mineral consisting of lead chloride and phosphate; a minor source of lead | Synonyms: green lead ore |
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| remora | (noun) marine fishes with a flattened elongated body and a sucking disk on the head for attaching to large fish or moving objects | Synonyms: suckerfish, sucking fish |
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| remorse | (noun) a feeling of deep regret (usually for some misdeed) | Synonyms: compunction, self-reproach |
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| rhizomorph | (noun) a dense mass of hyphae forming a root-like structure characteristic of many fungi | - |
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| rumor | (noun) gossip (usually a mixture of truth and untruth) passed around by word of mouth | Synonyms: hearsay, rumour |
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| rumormonger | (noun) a person given to gossiping and divulging personal information about others | Synonyms: gossip, gossiper, gossipmonger, newsmonger, rumourmonger |
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| sagamore | (noun) a chief of a North American tribe or confederation (especially an Algonquian chief) | Synonyms: sachem |
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| smorgasbord | (noun) an assortment of foods starting with herring or smoked eel or salmon etc with bread and butter; then cheeses and eggs and pickled vegetables and aspics; finally hot foods; served as a buffet meal | - |
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| (noun) a collection containing a variety of sorts of things | Synonyms: assortment, miscellanea, miscellany, mixed bag, mixture, motley, potpourri, salmagundi, variety |
| sophomore | (noun) a second-year undergraduate | Synonyms: soph |
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| sycamore | (noun) any of several trees of the genus Platanus having thin pale bark that scales off in small plates and lobed leaves and ball-shaped heads of fruits | Synonyms: plane tree, platan |
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| (noun) variably colored and sometimes variegated hard tough elastic wood of a sycamore tree | Synonyms: lacewood |
| (noun) Eurasian maple tree with pale grey bark that peels in flakes like that of a sycamore tree; leaves with five ovate lobes yellow in autumn | Synonyms: Acer pseudoplatanus, great maple, scottish maple |
| (noun) thick-branched wide-spreading tree of Africa and adjacent southwestern Asia often buttressed with branches rising from near the ground; produces cluster of edible but inferior figs on short leafless twigs; the biblical sycamore | Synonyms: Ficus sycomorus, mulberry fig, sycamore fig |
| thermoreceptor | (noun) a sensory receptor that responds to heat and cold | - |
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| thermoregulator | (noun) a regulator for automatically regulating temperature by starting or stopping the supply of heat | Synonyms: thermostat |
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| timorousness | (noun) fearfulness in venturing into new and unknown places or activities | Synonyms: timidity |
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| (noun) fear of the unknown or unfamiliar or fear of making decisions | Synonyms: timidity, timidness |
| tomorrow | (noun) the near future | - |
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| (noun) the day after today | - |
| tremor | (noun) an involuntary vibration (as if from illness or fear) | Synonyms: shudder |
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| (noun) a small earthquake | Synonyms: earth tremor, microseism |
| (noun) shaking or trembling (usually resulting from weakness or stress or disease) | - |
| tumor | (noun) an abnormal new mass of tissue that serves no purpose | Synonyms: neoplasm, tumour |
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| ulemorrhagia | (noun) bleeding of the gums | - |
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| zoomorphism | (noun) the attribution of animal forms or qualities to a god | - |
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