| behemoth | (noun) someone that is abnormally large and powerful | Synonyms: colossus, giant, goliath, monster |
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| (noun) a person of exceptional importance and reputation | Synonyms: colossus, giant, heavyweight, titan |
| bergamot | (noun) small tree with pear-shaped fruit whose oil is used in perfumery; Italy | Synonyms: bergamot orange, Citrus bergamia |
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| botulismotoxin | (noun) potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon | Synonyms: botulin, botulinus toxin |
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| chemotaxis | (noun) movement by a cell or organism in reaction to a chemical stimulus | - |
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| chemotherapy | (noun) the use of chemical agents to treat or control disease (or mental illness) | - |
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| commotion | (noun) the act of making a noisy disturbance | Synonyms: din, ruckus, ruction, rumpus, tumult |
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| (noun) confused movement | Synonyms: whirl |
| (noun) a disorderly outburst or tumult | Synonyms: disruption, disturbance, flutter, hoo-ha, hoo-hah, hurly burly, kerfuffle, to-do |
| cosmotron | (noun) a large proton synchrotron; uses frequency modulation of an electric field to accelerate protons | - |
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| demotion | (noun) act of lowering in rank or position | - |
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| emoticon | (noun) a representation of a facial expression (as a smile or frown) created by typing a sequence of characters in sending email | - |
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| emotion | (noun) any strong feeling | - |
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| emotionalism | (noun) emotional nature or quality | Synonyms: emotionality |
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| emotionality | (noun) emotional nature or quality | Synonyms: emotionalism |
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| emotionlessness | (noun) absence of emotion | Synonyms: unemotionality |
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| (noun) apathy demonstrated by an absence of emotional reactions | Synonyms: impassiveness, impassivity, indifference, phlegm, stolidity, unemotionality |
| famotidine | (noun) a histamine blocker (trade name Pepcid) used to treat peptic ulcers and gastritis and esophageal reflux | Synonyms: Pepcid |
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| foremother | (noun) a female ancestor | - |
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| gearmotor | (noun) a motor combined with a set of speed-reducing gears. | - |
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| godmother | (noun) any woman who serves as a sponsor for a child at baptism | - |
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| grandmother | (noun) the mother of your father or mother | Synonyms: gran, grandma, grannie, granny, nan, nanna |
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| guillemot | (noun) small black or brown speckled auks of northern seas | - |
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| haemothorax | (noun) accumulation of blood in the pleural cavity (the space between the lungs and the walls of the chest) | Synonyms: hemothorax |
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| hawkmoth | (noun) any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed | Synonyms: hawk moth, hummingbird moth, sphingid, sphinx moth |
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| hemothorax | (noun) accumulation of blood in the pleural cavity (the space between the lungs and the walls of the chest) | Synonyms: haemothorax |
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| homothecy | (noun) (mathematics) an isotropic scaling transformation of an affine space with a single fixed point. | Synonyms: homothety |
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| homotherm | (noun) an animal that has a body temperature that is relatively constant and independent of the environmental temperature | Synonyms: homeotherm, homoiotherm |
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| homothety | (noun) (mathematics) an isotropic scaling transformation of an affine space with a single fixed point. | Synonyms: homothecy |
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| homotoxicology | (noun) analysis of sickness within the framework of the body's failure to deal with the burden of toxins. Homeopathic remedies often are used as treatment. Developed by Hans Heinrich Reckeweg. | - |
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| housemother | (noun) a woman employed as a chaperon in a residence for young people | - |
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| hypermotility | (noun) excessive movement; especially excessive motility of the gastrointestinal tract | - |
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| immotility | (noun) lacking an ability to move | - |
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| leitmotif | (noun) a melodic phrase that accompanies the reappearance of a person or situation (as in Wagner's operas) | Synonyms: leitmotiv |
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| leitmotiv | (noun) a melodic phrase that accompanies the reappearance of a person or situation (as in Wagner's operas) | Synonyms: leitmotif |
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| locomotion | (noun) self-propelled movement | Synonyms: travel |
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| (noun) the power or ability to move | Synonyms: motive power, motivity |
| locomotive | (noun) a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks | Synonyms: engine, locomotive engine, railway locomotive |
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| mammoth | (noun) any of numerous extinct elephants widely distributed in the Pleistocene; extremely large with hairy coats and long upcurved tusks | - |
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| mammothermography | (noun) the use of thermography to detect breast tumors (which appear as hot spots) | - |
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| marmot | (noun) stocky coarse-furred burrowing rodent with a short bushy tail found throughout the Northern Hemisphere; hibernates in winter | - |
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| momot | (noun) tropical American bird resembling a blue jay and having greenish and bluish plumage | Synonyms: motmot |
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| mot | (noun) a clever remark | Synonyms: bon mot |
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| mote | (noun) (nontechnical usage) a tiny piece of anything | Synonyms: atom, corpuscle, molecule, particle, speck |
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| motel | (noun) a motor hotel | - |
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| motet | (noun) an unaccompanied choral composition with sacred lyrics; intended to be sung as part of a church service; originated in the 13th century | - |
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| moth | (noun) typically crepuscular or nocturnal insect having a stout body and feathery or hairlike antennae | - |
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| mothball | (noun) a small sphere of camphor or naphthalene used to keep moths away from stored clothing | Synonyms: camphor ball |
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| mother | (noun) a condition that is the inspiration for an activity or situation | - |
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| (noun) a woman who has given birth to a child (also used as a term of address to your mother) | Synonyms: female parent |
| (noun) a term of address for a mother superior | - |
| (noun) a term of address for an elderly woman | - |
| (noun) a stringy slimy substance consisting of yeast cells and bacteria; forms during fermentation and is added to cider or wine to produce vinegar | - |
| motherese | (noun) an adult's imitation of the speech of a young child | Synonyms: baby talk, babytalk |
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| motherfucker | (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: asshole, bastard, cocksucker, dickhead, mother fucker, prick, shit, SOB, son of a bitch, whoreson |
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| motherhood | (noun) the kinship relation between an offspring and the mother | Synonyms: maternity |
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| motherland | (noun) the country where you were born | Synonyms: country of origin, fatherland, homeland, mother country, native land |
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| motherliness | (noun) the quality of having or showing the tenderness and warmth and affection of or befitting a mother | Synonyms: maternal quality, maternalism, maternity |
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| motherwort | (noun) bitter Old World herb of hedgerows and woodland margins having toothed leaves and white or pale pink flowers | Synonyms: Leonurus cardiaca |
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| motif | (noun) a design or figure that consists of recurring shapes or colors, as in architecture or decoration | Synonyms: motive |
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| (noun) a unifying idea that is a recurrent element in literary or artistic work | Synonyms: theme |
| (noun) a theme that is repeated or elaborated in a piece of music | Synonyms: motive |
| motile | (noun) one whose prevailing mental imagery takes the form of inner feelings of action | - |
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| motilin | (noun) a gastrointestinal hormone that apparently participates in controlling smooth muscle contractions in the stomach and small intestine | - |
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| motility | (noun) a change of position that does not entail a change of location | Synonyms: motion, move, movement |
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| (noun) ability to move spontaneously and independently | - |
| motion | (noun) a change of position that does not entail a change of location | Synonyms: motility, move, movement |
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| (noun) the act of changing location from one place to another | Synonyms: move, movement |
| (noun) the use of movements (especially of the hands) to communicate familiar or prearranged signals | Synonyms: gesture |
| (noun) a formal proposal for action made to a deliberative assembly for discussion and vote | Synonyms: question |
| (noun) a natural event that involves a change in the position or location of something | Synonyms: movement |
| (noun) an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object | Synonyms: apparent motion, apparent movement, movement |
| (noun) a state of change | - |
| motionlessness | (noun) a state of no motion or movement | Synonyms: lifelessness, stillness |
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| motivating | (noun) the act of motivating; providing incentive | Synonyms: motivation |
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| motivation | (noun) the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior | Synonyms: motive, need |
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| (noun) the act of motivating; providing incentive | Synonyms: motivating |
| (noun) the condition of being motivated | - |
| motivator | (noun) a positive motivational influence | Synonyms: incentive, inducement |
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| motive | (noun) the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior | Synonyms: motivation, need |
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| (noun) a design or figure that consists of recurring shapes or colors, as in architecture or decoration | Synonyms: motif |
| (noun) a theme that is repeated or elaborated in a piece of music | Synonyms: motif |
| motivity | (noun) the power or ability to move | Synonyms: locomotion, motive power |
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| motley | (noun) a multicolored woolen fabric woven of mixed threads in 14th to 17th century England | - |
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| (noun) a garment made of motley (especially a court jester's costume) | - |
| (noun) a collection containing a variety of sorts of things | Synonyms: assortment, miscellanea, miscellany, mixed bag, mixture, potpourri, salmagundi, smorgasbord, variety |
| motmot | (noun) tropical American bird resembling a blue jay and having greenish and bluish plumage | Synonyms: momot |
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| motoneuron | (noun) a neuron conducting impulses outwards from the brain or spinal cord | Synonyms: efferent neuron, motor nerve fiber, motor neuron |
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| motor | (noun) machine that converts other forms of energy into mechanical energy and so imparts motion | - |
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| (noun) a nonspecific agent that imparts motion | - |
| motorbike | (noun) small motorcycle with a low frame and small wheels and elevated handlebars | Synonyms: minibike |
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| motorboat | (noun) a boat propelled by an internal-combustion engine | Synonyms: powerboat |
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| motorbus | (noun) a vehicle carrying many passengers; used for public transport | Synonyms: autobus, bus, charabanc, coach, double-decker, jitney, motorcoach, omnibus, passenger vehicle |
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| motorcade | (noun) a procession of people traveling in motor cars | - |
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| motorcar | (noun) a motor vehicle with four wheels; usually propelled by an internal combustion engine | Synonyms: auto, automobile, car, machine |
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| motorcoach | (noun) a vehicle carrying many passengers; used for public transport | Synonyms: autobus, bus, charabanc, coach, double-decker, jitney, motorbus, omnibus, passenger vehicle |
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| motorcycle | (noun) a motor vehicle with two wheels and a strong frame | Synonyms: bike |
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| motorcycling | (noun) riding a motorcycle | - |
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| motorcyclist | (noun) a traveler who rides a motorcycle | - |
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| motoring | (noun) the act of driving an automobile | - |
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| motorisation | (noun) the act of motorizing (equipping with motors or with motor vehicles) | Synonyms: motorization |
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| motorist | (noun) someone who drives (or travels in) an automobile | Synonyms: automobilist |
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| motorization | (noun) the act of motorizing (equipping with motors or with motor vehicles) | Synonyms: motorisation |
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| motorman | (noun) the operator of streetcar | - |
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| motormouth | (noun) someone who talks incessantly | - |
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| motortruck | (noun) an automotive vehicle suitable for hauling | Synonyms: truck |
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| motorway | (noun) a broad highway designed for high-speed traffic | Synonyms: expressway, freeway, pike, state highway, superhighway, throughway, thruway |
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| mottle | (noun) an irregular arrangement of patches of color | - |
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| mottling | (noun) the act of coloring with areas of different shades | - |
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| motto | (noun) a favorite saying of a group, organization or individual | Synonyms: catchword, shibboleth, slogan |
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| normothermia | (noun) normal body temperature | - |
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| oculomotor | (noun) supplies extrinsic muscles of the eye | Synonyms: nervus oculomotorius, oculomotor nerve, third cranial nerve |
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| pneumothorax | (noun) abnormal presence of air in the pleural cavity resulting in the collapse of the lung; may be spontaneous (due to injury to the chest) or induced (as a treatment for tuberculosis) | - |
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| promoter | (noun) someone who is an active supporter and advocate | Synonyms: booster, plugger |
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| (noun) a sponsor who books and stages public entertainments | Synonyms: impresario, showman |
| promotion | (noun) act of raising in rank or position | - |
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| (noun) the advancement of some enterprise | Synonyms: forwarding, furtherance |
| (noun) a message issued in behalf of some product or cause or idea or person or institution | Synonyms: packaging, promo, promotional material, publicity |
| (noun) encouragement of the progress or growth or acceptance of something | Synonyms: advancement, furtherance |
| remote | (noun) a device that can be used to control a machine or apparatus from a distance | Synonyms: remote control |
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| remoteness | (noun) the property of being remote | Synonyms: farawayness, farness |
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| (noun) a disposition to be distant and unsympathetic in manner | Synonyms: aloofness, standoffishness, withdrawnness |
| remotion | (noun) the act of removing | Synonyms: removal |
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| smother | (noun) a stifling cloud of smoke | - |
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| (noun) a confused multitude of things | Synonyms: clutter, fuddle, jumble, mare's nest, muddle, welter |
| smotherer | (noun) a person who stifles or smothers or suppresses | Synonyms: stifler |
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| stepmother | (noun) the wife of your father by a subsequent marriage | - |
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| thermotherapy | (noun) the use of heat to treat a disease or disorder; heating pads or hot compresses or hot-water bottles are used to promote circulation in peripheral vascular disease or to relax tense muscles | - |
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| thermotropism | (noun) an orienting response to warmth | - |
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| timothy | (noun) a grass grown for hay | - |
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| (noun) grass with long cylindrical spikes grown in northern United States and Europe for hay | Synonyms: herd's grass, Phleum pratense |
| unemotionality | (noun) absence of emotion | Synonyms: emotionlessness |
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| (noun) apathy demonstrated by an absence of emotional reactions | Synonyms: emotionlessness, impassiveness, impassivity, indifference, phlegm, stolidity |