| hamstring | (noun) one of the tendons at the back of the knee | Synonyms: hamstring tendon |
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| heartstrings | (noun) your deepest feelings of love and compassion | - |
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| histrion | (noun) a theatrical performer | Synonyms: actor, player, role player, thespian |
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| histrionics | (noun) a performance of a play | Synonyms: representation, theatrical, theatrical performance |
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| (noun) a deliberate display of emotion for effect | - |
| hydroelectricity | (noun) electricity produced by water power | - |
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| illustriousness | (noun) the property possessed by something or someone of outstanding importance or eminence | Synonyms: greatness |
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| indoctrination | (noun) teaching someone to accept doctrines uncritically | - |
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| industrialisation | (noun) the development of industry on an extensive scale | Synonyms: industrial enterprise, industrialization |
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| industrialism | (noun) an economic system built on large industries rather than on agriculture or craftsmanship | - |
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| industrialist | (noun) someone who manages or has significant financial interest in an industrial enterprise | - |
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| industrialization | (noun) the development of industry on an extensive scale | Synonyms: industrial enterprise, industrialisation |
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| industriousness | (noun) persevering determination to perform a task | Synonyms: diligence, industry |
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| inheritrix | (noun) a female heir | Synonyms: heiress, inheritress |
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| intertrigo | (noun) chafing between two skin surfaces that are in contact (as in the armpit or under the breasts or between the thighs) | - |
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| intricacy | (noun) marked by elaborately complex detail | Synonyms: elaborateness, elaboration, involution |
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| intrigue | (noun) a crafty and involved plot to achieve your (usually sinister) ends | Synonyms: machination |
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| (noun) a clandestine love affair | - |
| intriguer | (noun) a person who devises plots or intrigues | Synonyms: designer |
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| isometric | (noun) a line connecting isometric points | Synonyms: isometric line |
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| isometrics | (noun) muscle-building exercises (or a system of musclebuilding exercises) involving muscular contractions against resistance without movement (the muscles contracts but the length of the muscle does not change) | Synonyms: isometric exercise |
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| ketotriose | (noun) Any ketose having three carbon atoms; in reality, only dihydroxyacetone. | - |
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| laetrile | (noun) a substance derived from amygdalin; publicized as an antineoplastic drug although there is no supporting evidence | - |
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| latchstring | (noun) opener consisting of a string that can be passed through a hole in a door for raising the latch from outside | - |
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| latria | (noun) the worship given to God alone | Synonyms: adoration |
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| latrine | (noun) a public toilet in a military area | - |
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| loosestrife | (noun) any of numerous herbs and subshrubs of the genus Lythrum | - |
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| (noun) any of various herbs and subshrubs of the genus Lysimachia | - |
| lymantriid | (noun) dull-colored moth whose larvae have tufts of hair on the body and feed on the leaves of many deciduous trees | Synonyms: tussock moth |
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| malnutrition | (noun) a state of poor nutrition; can result from insufficient or excessive or unbalanced diet or from inability to absorb foods | - |
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| matriarch | (noun) a female head of a family or tribe | Synonyms: materfamilias |
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| (noun) a feisty older woman with a big bosom (as drawn in cartoons) | - |
| matriarchate | (noun) a form of social organization in which a female is the family head and title is traced through the female line | Synonyms: matriarchy |
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| matriarchy | (noun) a form of social organization in which a female is the family head and title is traced through the female line | Synonyms: matriarchate |
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| matric | (noun) admission to a group (especially a college or university) | Synonyms: matriculation |
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| matricide | (noun) the murder of your mother | - |
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| (noun) a person who murders their mother | - |
| matriculate | (noun) someone who has been admitted to a college or university | - |
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| matriculation | (noun) admission to a group (especially a college or university) | Synonyms: matric |
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| matrikin | (noun) one related on the mother's side | Synonyms: enate, matrilineal kin, matrilineal sib, matrisib |
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| matrilineage | (noun) line of descent traced through the maternal side of the family | Synonyms: cognation, enation |
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| matrilineality | (noun) a system in which a person's descent is traced through their mother and her maternal ancestors. | - |
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| matrimony | (noun) the ceremony or sacrament of marriage | - |
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| (noun) the state of being a married couple voluntarily joined for life (or until divorce) | Synonyms: marriage, spousal relationship, union, wedlock |
| matrisib | (noun) one related on the mother's side | Synonyms: enate, matrikin, matrilineal kin, matrilineal sib |
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| matrix | (noun) mold used in the production of phonograph records, type, or other relief surface | - |
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| (noun) the formative tissue at the base of a nail | - |
| (noun) the body substance in which tissue cells are embedded | Synonyms: ground substance, intercellular substance |
| (noun) (mathematics) a rectangular array of quantities or expressions set out by rows and columns; treated as a single element and manipulated according to rules | - |
| (noun) an enclosure within which something originates or develops | - |
| (noun) (geology) a mass of fine-grained rock in which fossils, crystals, or gems are embedded | - |
| mediatrix | (noun) a woman who is a mediator | - |
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| meretriciousness | (noun) an appearance of truth that is false or deceptive; seeming plausibility | Synonyms: speciousness |
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| (noun) tasteless showiness | Synonyms: brashness, flashiness, garishness, gaudiness, glitz, loudness, tawdriness |
| metric | (noun) a system of related measures that facilitates the quantification of some particular characteristic | Synonyms: system of measurement |
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| (noun) a decimal unit of measurement of the metric system (based on meters and kilograms and seconds) | Synonyms: metric unit |
| (noun) a function of a topological space that gives, for any two points in the space, a value equal to the distance between them | Synonyms: metric function |
| metrication | (noun) the act of changing from imperial units of measurement to metric units: meters, grams, seconds | Synonyms: metrification |
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| metrics | (noun) the study of poetic meter and the art of versification | Synonyms: prosody |
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| metrification | (noun) the act of changing from imperial units of measurement to metric units: meters, grams, seconds | Synonyms: metrication |
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| (noun) writing a metrical composition (or the metrical structure of a composition) | - |
| metritis | (noun) inflammation of the lining of the uterus (of the endometrium) | Synonyms: endometritis |
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| micronutrient | (noun) a substance needed only in small amounts for normal body function (e.g., vitamins or minerals) | - |
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| mistrial | (noun) a trial that is invalid or inconclusive | - |
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| monitrice | (noun) an assistant (often the father of the soon-to-be-born child) who provides support for a woman in labor by encouraging her to use techniques learned in childbirth-preparation classes | Synonyms: birthing coach, doula, labor coach |
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| monocentrism | (noun) the property of having or proceeding from a single center. | - |
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| myometritis | (noun) inflammation of the myometrium | - |
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| myometrium | (noun) the smooth muscle forming the wall of the uterus | - |
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| natriuresis | (noun) the presence of abnormally large amounts of sodium in the urine | - |
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| negotiatrix | (noun) a woman negotiator | Synonyms: negotiatress |
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| neutrino | (noun) an elementary, electrically neutral particle with a very small mass | - |
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| nightrider | (noun) member of a secret mounted band in United States South after the American Civil War; committed acts of intimidation and revenge | Synonyms: night rider |
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| nitride | (noun) a compound containing nitrogen and a more electropositive element (such as phosphorus or a metal) | - |
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| nitrification | (noun) the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants) | - |
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| (noun) the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound) | - |
| nitril | (noun) any of a class of organic compounds containing the cyano radical -CN | Synonyms: cyanide, nitrile |
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| nitrile | (noun) any of a class of organic compounds containing the cyano radical -CN | Synonyms: cyanide, nitril |
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| nitrite | (noun) the radical -NO2 or any compound containing it (such as a salt or ester of nitrous acid) | - |
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| nontricyclic | (noun) a class of antidepressant drugs that are not tricyclic drugs and do not act by inhibiting MAO | Synonyms: nontricyclic antidepressant, nontricyclic antidepressant drug, nontricyclic drug |
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| nortriptyline | (noun) a tricyclic antidepressant drug (trade name Pamelor) used along with psychotherapy to treat dysthymic depression; may interact dangerously if taken with other drugs | Synonyms: Pamelor |
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| nostril | (noun) either one of the two external openings to the nasal cavity in the nose | Synonyms: anterior naris |
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| nutria | (noun) aquatic South American rodent resembling a small beaver; bred for its fur | Synonyms: coypu, Myocastor coypus |
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| nutrient | (noun) any substance that can be metabolized by an animal to give energy and build tissue | Synonyms: food |
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| (noun) any substance (such as a chemical element or inorganic compound) that can be taken in by a green plant and used in organic synthesis | - |
| nutriment | (noun) a source of materials to nourish the body | Synonyms: aliment, alimentation, nourishment, nutrition, sustenance, victuals |
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| nutrition | (noun) the scientific study of food and drink (especially in humans) | - |
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| (noun) a source of materials to nourish the body | Synonyms: aliment, alimentation, nourishment, nutriment, sustenance, victuals |
| (noun) (physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance | - |
| nutritionist | (noun) a specialist in the study of nutrition | - |
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| nutritiousness | (noun) the quality of being nourishing and promoting healthy growth | Synonyms: nutritiveness |
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| nutritiveness | (noun) the quality of being nourishing and promoting healthy growth | Synonyms: nutritiousness |
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| obstetrician | (noun) a physician specializing in obstetrics | Synonyms: accoucheur |
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| obstetrics | (noun) the branch of medicine dealing with childbirth and care of the mother | Synonyms: midwifery, OB, tocology |
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| oestriol | (noun) a naturally occurring estrogenic hormone; a synthetic form is used to treat estrogen deficiency | Synonyms: estriol |
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| optometrist | (noun) a person skilled in testing for defects of vision in order to prescribe corrective glasses | Synonyms: oculist |
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| ostrich | (noun) fast-running African flightless bird with two-toed feet; largest living bird | Synonyms: Struthio camelus |
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| (noun) a person who refuses to face reality or recognize the truth (a reference to the popular notion that the ostrich hides from danger by burying its head in the sand) | - |
| outrider | (noun) an escort who rides ahead (as a member of the vanguard) | - |
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| outrigger | (noun) a stabilizer for a canoe; spars attach to a shaped log or float parallel to the hull | - |
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| paediatrician | (noun) a specialist in the care of babies | Synonyms: baby doctor, pediatrician, pediatrist |
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| paediatrics | (noun) the branch of medicine concerned with the treatment of infants and children | Synonyms: pediatric medicine, pediatrics, pedology |
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| paleostriatum | (noun) the inner pale yellow part of the lenticular nucleus | Synonyms: globus pallidus, pallidum |
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| paltriness | (noun) worthlessness due to insignificance | Synonyms: sorriness |
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| parametritis | (noun) inflammation of connective tissue adjacent to the uterus | - |
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| partridge | (noun) small Old World gallinaceous game birds | - |
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| (noun) a popular North American game bird; named for its call | Synonyms: bobwhite, bobwhite quail |
| (noun) valued as a game bird in eastern United States and Canada | Synonyms: Bonasa umbellus, ruffed grouse |
| (noun) heavy-bodied small-winged South American game bird resembling a gallinaceous bird but related to the ratite birds | Synonyms: tinamou |
| (noun) flesh of either quail or grouse | - |
| partridgeberry | (noun) creeping woody plant of eastern North America with shiny evergreen leaves and scarlet berries | Synonyms: boxberry, Mitchella repens, twinberry |
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| patrial | (noun) a person who has the right to be considered legally a British citizen (by virtue of the birth of a parent or grandparent) | - |
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| patriarch | (noun) the male head of family or tribe | Synonyms: paterfamilias |
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| (noun) any of the early biblical characters regarded as fathers of the human race | - |
| (noun) title for the heads of the Eastern Orthodox Churches (in Istanbul and Alexandria and Moscow and Jerusalem) | - |
| (noun) a man who is older and higher in rank than yourself | - |
| patriarchate | (noun) a form of social organization in which a male is the family head and title is traced through the male line | Synonyms: patriarchy |
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| (noun) the jurisdiction of a patriarch | - |
| patriarchy | (noun) a form of social organization in which a male is the family head and title is traced through the male line | Synonyms: patriarchate |
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| patrician | (noun) a member of the aristocracy | Synonyms: aristocrat, blue blood |
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| (noun) a person of refined upbringing and manners | - |
| patriciate | (noun) members of the patrician class. | - |
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| patricide | (noun) the murder of your father | - |
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| (noun) a person who murders their father | - |
| patrikin | (noun) one related on the father's side | Synonyms: agnate, patrilineal kin, patrilineal sib, patrisib |
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| patrilineage | (noun) line of descent traced through the paternal side of the family | Synonyms: agnation |
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| patrimony | (noun) an inheritance coming by right of birth (especially by primogeniture) | Synonyms: birthright |
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| (noun) a church endowment | - |
| patriot | (noun) one who loves and defends his or her country | Synonyms: nationalist |
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| patrioteer | (noun) an extreme bellicose nationalist | Synonyms: chauvinist, flag-waver, hundred-percenter, jingo, jingoist |
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| patriotism | (noun) love of country and willingness to sacrifice for it | Synonyms: nationalism |
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| patrisib | (noun) one related on the father's side | Synonyms: agnate, patrikin, patrilineal kin, patrilineal sib |
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