10-letter words starting with M
Embark on a linguistic journey with words that begin with the letter M. This section showcases how M at the start shapes the identity and sound of various words. From commonly used terms to rare finds, explore the diverse range of words that start with M, enriching your vocabulary and appreciation for language.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| mysterious | 15 | of an obscure nature | the new insurance policy is written without cryptic or mysterious terms |
| medication | 15 | (medicine) something that treats or prevents or alleviates the symptoms of disease | - |
| management | 15 | the act of managing something | he was given overall management of the program |
| motorcycle | 19 | ride a motorcycle | - |
| misfortune | 15 | an unfortunate state resulting from unfavorable outcomes | - |
| mechanical | 19 | relating to or concerned with machinery or tools | mechanical arts |
| manchester | 17 | a city in northwestern England (30 miles to the east of Liverpool); heart of the most densely populated area of England | - |
| microphone | 19 | device for converting sound waves into electrical energy | - |
| marvellous | 15 | too improbable to admit of belief | - |
| millennium | 14 | the 1000th anniversary (or the celebration of it) | - |
| motivation | 15 | the act of motivating; providing incentive | - |
| manuscript | 16 | handwritten book or document | - |
| monitoring | 13 | the act of observing something (and sometimes keeping a record of it) | the monitoring of enemy communications plays an important role in war times |
| manipulate | 14 | tamper, with the purpose of deception | - |
| meaningful | 16 | having a meaning or purpose | a meaningful explanation |
| meditation | 13 | continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature | the habit of meditation is the basis for all real knowledge |
| motherland | 16 | the country where you were born | - |
| membership | 21 | the body of members of an organization or group | they polled their membership |
| maintained | 13 | continued in your keeping or use or memory | - |
| melancholy | 20 | characterized by or causing or expressing sadness | growing more melancholy every hour |
| miraculous | 14 | peculiarly fortunate or appropriate; as if by divine intervention | - |
| magistrate | 13 | a lay judge or civil authority who administers the law (especially one who conducts a court dealing with minor offenses) | - |
| missionary | 15 | someone sent on a mission--especially a religious or charitable mission to a foreign country | - |
| mainstream | 14 | the prevailing current of thought | his thinking was in the American mainstream |
| masturbate | 14 | get sexual gratification through self-stimulation | - |
| mayonnaise | 15 | egg yolks and oil and vinegar | - |
| microscope | 18 | magnifier of the image of small objects | the invention of the microscope led to the discovery of the cell |
| metropolis | 14 | people living in a large densely populated municipality | - |
| millimeter | 14 | a metric unit of length equal to one thousandth of a meter | - |
| marseilles | 12 | a port city in southeastern France on the Mediterranean | - |
| marguerite | 13 | perennial subshrub of the Canary Islands having usually pale yellow daisylike flowers; often included in genus Chrysanthemum | - |
| mastermind | 15 | plan and direct (a complex undertaking) | he masterminded the robbery |
| meticulous | 14 | marked by precise accordance with details | meticulous research |
| multiplied | 15 | greatly increased as by multiplication | - |
| meditating | 14 | - | - |
| monumental | 14 | imposing in size or bulk or solidity | a monumental scale |
| motherhood | 19 | the kinship relation between an offspring and the mother | - |
| metabolism | 16 | the marked and rapid transformation of a larva into an adult that occurs in some animals | - |
| masquerade | 22 | a party of guests wearing costumes and masks | - |
| misleading | 14 | designed to deceive or mislead either deliberately or inadvertently | a misleading similarity |
| mistreated | 13 | subjected to cruel treatment | - |
| misconduct | 17 | activity that transgresses moral or civil law | - |
| monogamous | 15 | (used of relationships and of individuals) having one mate | monogamous marriage |
| mutilation | 12 | the act of damaging the appearance or surface of something | - |
| magnifying | 20 | - | - |
| meningitis | 13 | infectious disease characterized by inflammation of the meninges (the tissues that surround the brain or spinal cord) usually caused by a bacterial infection; symptoms include headache and stiff neck and fever and nausea | - |
| mediocrity | 18 | ordinariness as a consequence of being average and not outstanding | - |
| mistakenly | 19 | in a mistaken or erroneous manner | he mistakenly believed it |
| moderation | 13 | the trait of avoiding excesses | - |
| mouthpiece | 19 | the aperture of a wind instrument into which the player blows directly | - |
| matchmaker | 23 | someone who arranges (or tries to arrange) marriages for others | - |
| manageable | 15 | capable of existing or taking place or proving true; possible to do | - |
| motionless | 12 | not in physical motion | - |
| margherita | 16 | - | - |
| millimetre | 14 | a metric unit of length equal to one thousandth of a meter | - |
| misbehaved | 21 | - | - |
| mozzarella | 30 | mild white Italian cheese | - |
| memorandum | 17 | a written proposal or reminder | - |
| monotonous | 12 | tediously repetitious or lacking in variety | nothing is so monotonous as the sea |
| motherless | 15 | having no living or known mother | - |
| mascarpone | 16 | soft mild Italian cream cheese | - |
| marionette | 12 | a small figure of a person operated from above with strings by a puppeteer | - |
| memorizing | 24 | - | - |
| manicurist | 14 | a beautician who cleans and trims and polishes the fingernails | - |
| maniacally | 17 | in a maniacal manner or to a maniacal degree | he was maniacally obsessed with jealousy |
| methodical | 18 | characterized by method and orderliness | a methodical scholar |
| moderately | 16 | to certain extent or degree | - |
| misogynist | 16 | a misanthrope who dislikes women in particular | - |
| mathematic | 19 | - | - |
| mesmerized | 24 | having your attention fixated as though by a spell | - |
| midshipman | 20 | a temporary rank held by young naval officers in training | - |
| multimedia | 15 | transmission that combine media of communication (text and graphics and sound etc.) | - |
| mesmerised | 15 | having your attention fixated as though by a spell | - |
| meditative | 16 | deeply or seriously thoughtful | - |
| minimalist | 14 | a conservative who advocates only minor reforms in government or politics | - |
| motivating | 16 | the act of motivating; providing incentive | - |
| medicating | 16 | - | - |
| malevolent | 15 | having or exerting a malignant influence | malevolent stars |
| militarism | 14 | a political orientation of a people or a government to maintain a strong military force and to be prepared to use it aggressively to defend or promote national interests | - |
| moratorium | 14 | a legally authorized postponement before some obligation must be discharged | - |
| meningioma | 15 | a tumor arising in the meninges which surround the brain and spinal cord; usually slow growing and sometimes malignant | - |
| monotheism | 17 | belief in a single God | - |
| monolithic | 17 | imposing in size or bulk or solidity | the monolithic proportions of Stalinist architecture |
| midwestern | 16 | of a region of the United States generally including Ohio; Indiana; Illinois; Iowa; Missouri; Kansas; Nebraska; and sometimes Michigan; Wisconsin; Minnesota | a midwestern city |
| measurable | 14 | capable of being measured | measurable depths |
| militaries | 12 | - | - |
| managerial | 13 | of or relating to the function or responsibility or activity of management | - |
| manservant | 15 | a man servant | - |
| menstruate | 12 | undergo menstruation | - |
| militarily | 15 | with respect to the military | on a militarily significant scale |
| moneymaker | 21 | a project that generates a continuous flow of money | - |
| marketable | 18 | fit to be offered for sale | marketable produce |
| mercifully | 20 | in a compassionate manner | he dealt with the thief mercifully |
| meddlesome | 16 | intrusive in a meddling or offensive manner | - |
| midsection | 15 | the middle area of the human torso (usually in front) | - |
| morphology | 21 | the branch of geology that studies the characteristics and configuration and evolution of rocks and land forms | - |
| metallurgy | 16 | the science and technology of metals | - |
| mystifying | 22 | of an obscure nature | rituals totally mystifying to visitors from other lands |
| materially | 15 | with respect to material aspects | psychologically similar but materially different |
| mechanized | 27 | equipped with machinery | a mechanized factory |
| moonstruck | 18 | insane and believed to be affected by the phases of the moon | - |
| myocardial | 18 | of or relating to the myocardium | - |
| mastectomy | 19 | surgical removal of a breast to remove a malignant tumor | - |
| menopausal | 14 | of or relating to the menopause | - |
| megalithic | 18 | of or relating to megaliths or the people who erected megaliths | megalithic monuments like Stonehenge |
| metastasis | 12 | the spreading of a disease (especially cancer) to another part of the body | - |
| misreading | 14 | misinterpretation caused by inaccurate reading | - |
| monopolize | 23 | have and control fully and exclusively | He monopolizes the laser printer |
| mujahideen | 23 | a military force of Muslim guerilla warriors engaged in a jihad | - |
| matchstick | 23 | a short thin stick of wood used in making matches | - |
| methuselah | 18 | a man who is very old | - |
| mercantile | 14 | profit oriented | preached a mercantile and militant patriotism |
| mimeograph | 20 | print copies from (a prepared stencil) using a mimeograph | She mimeographed the syllabus |
| monarchist | 17 | an advocate of the principles of monarchy | - |
| modernized | 23 | brought up to date | modernized methods |
| moisturize | 21 | make (more) humid | - |
| modulation | 13 | a musical passage moving from one key to another | - |
| militiaman | 14 | a member of the militia; serves only during emergencies | - |
| minestrone | 12 | soup made with a variety of vegetables | - |
| molybdenum | 20 | a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel | - |
| mudskipper | 21 | found in tropical coastal regions of Africa and Asia; able to move on land on strong pectoral fins | - |
| masterwork | 19 | - | - |
| maraschino | 17 | cherry preserved in true or imitation maraschino liqueur | - |
| metabolize | 23 | produce by metabolism | - |
| mechanised | 18 | equipped with machinery | - |
| meandering | 14 | of a path e.g. | meandering streams |
| mindlessly | 16 | in an unreasonably senseless manner | these temples were mindlessly destroyed by the Red Guards |
| moralistic | 14 | narrowly and conventionally moral | - |
| mutilating | 13 | - | - |
| mainlander | 13 | - | - |
| menacingly | 18 | in a menacing manner | the voice at the other end of the line dropped menacingly |
| mesosphere | 17 | the atmospheric layer between the stratosphere and the thermosphere | - |
| mortifying | 19 | causing awareness of your shortcomings | - |
| monochrome | 19 | a black-and-white photograph or slide | - |
| moviemaker | 21 | - | - |
| mackintosh | 21 | a waterproof raincoat made of rubberized fabric | - |
| magnetized | 23 | having the properties of a magnet; i.e. of attracting iron or steel | - |
| masterless | 12 | having no lord or master | harsh punishments for sturdy vagabonds and masterless men |
| meadowlark | 20 | North American songbirds having a yellow breast | - |
| milliliter | 12 | a metric unit of volume equal to one thousandth of a liter | - |
| mismatched | 20 | (of a contest or contestants) not fairly matched as opponents | - |
| monogamist | 15 | someone who practices monogamy (one spouse at a time) | - |
| musicality | 17 | the property of sounding like music | - |
| motormouth | 17 | someone who talks incessantly | I wish that motormouth would shut up |
| maturation | 12 | coming to full development; becoming mature | - |
| metaphoric | 19 | expressing one thing in terms normally denoting another | a metaphorical expression |
| miniseries | 12 | - | - |
| methodists | 16 | a Protestant denomination founded on the principles of John Wesley and Charles Wesley | - |
| microfiche | 22 | small sheet of microfilm on which many pages of material have been photographed; a magnification system is used to read the material | - |
| mousseline | 12 | - | - |
| marinating | 13 | - | - |
| manageress | 13 | a woman manager | - |
| malignancy | 18 | (medicine) a malignant state; progressive and resistant to treatment and tending to cause death | - |
| marginally | 16 | in a marginal manner | marginally interesting |
| millennial | 12 | relating to a millennium or span of a thousand years | - |
| minimizing | 24 | - | - |
| monopolise | 14 | have and control fully and exclusively | - |
| moralizing | 22 | indulgence in moral pronouncements; the exposition (often superficially) of a particular moral code | his constant moralizing drove me mad |
| magnetised | 14 | having the properties of a magnet; i.e. of attracting iron or steel | - |
| masticated | 15 | - | - |
| mandragora | 14 | a genus of stemless herbs of the family Solanaceae | - |
| malcontent | 14 | discontented as toward authority | - |
| marathoner | 15 | someone who participates in long-distance races (especially in marathons) | - |
| maximizing | 31 | making as great as possible | - |
| mignonette | 13 | Mediterranean woody annual widely cultivated for its dense terminal spikelike clusters greenish or yellowish white flowers having an intense spicy fragrance | - |
| metaphysic | 22 | - | - |
| microscopy | 21 | research with the use of microscopes | - |
| mismanaged | 16 | - | - |
| mobilising | 15 | - | - |
| mislabeled | 15 | branded or labeled falsely and in violation of statutory requirements | - |
| mortadella | 13 | - | - |
| musicology | 18 | the scholarly and scientific study of music | - |
| motiveless | 15 | occurring without motivation or provocation | motiveless malignity |
| majestical | 21 | - | - |
| matriarchy | 20 | a form of social organization in which a female is the family head and title is traced through the female line | - |
| mendacious | 15 | given to lying | a mendacious child |
| metacarpal | 16 | any bone of the hand between the wrist and fingers | - |
| mesenteric | 14 | of or relating to or located in a mesentery | - |
| maximising | 22 | making as great as possible | - |
| mellowness | 15 | the property of a sensation that is rich and pleasing | the cheap wine had no body, no mellowness |
| militarist | 12 | a person who advocates war or warlike policies | - |
| millilitre | 12 | a metric unit of volume equal to one thousandth of a liter | - |
| metastatic | 14 | relating to or affected by metastasis | metastatic growth |
| metatarsal | 12 | any bone of the foot between the ankle and the toes | - |
| misplacing | 17 | - | - |
| misquoting | 22 | - | - |
| misogynous | 16 | hating women in particular | - |
| mortuaries | 12 | - | - |
| modernised | 14 | brought up to date | - |
| monetarily | 15 | - | - |
| munificent | 17 | very generous | a munificent gift |
| multistory | 15 | having more than one story | - |
| mainlining | 13 | - | - |
| mandibular | 15 | relating to the lower jaw | - |
| maltreated | 13 | subjected to cruel treatment | - |
| manifestly | 18 | unmistakably (`plain' is often used informally for `plainly') | he was manifestly too important to leave off the guest list |
| metoprolol | 14 | beta blocker (trade name Lopressor) used in treating hypertension and angina and arrhythmia and acute myocardial infarction; has adverse side effects (depression and exacerbation of congestive heart failure etc.) | - |
| mesmerizer | 23 | a person who induces hypnosis | - |
| mightiness | 16 | physical strength | - |
| minimising | 15 | - | - |
| methylated | 19 | having received a methyl group | methylated alcohol |
| moonflower | 18 | pantropical climber having white fragrant nocturnal flowers | - |
| muttonhead | 16 | a stupid person; these words are used to express a low opinion of someone's intelligence | - |
| myasthenia | 18 | a chronic progressive disease characterized by chronic fatigue and muscular weakness (especially in the face and neck); caused by a deficiency of acetylcholine at the neuromuscular junctions | - |
| mystically | 20 | in a mystical manner | chant mystically |
| muckraking | 23 | the exposure of scandal (especially about public figures) | - |
| magistracy | 18 | the position of magistrate | - |
| maidenhead | 17 | a fold of tissue that partly covers the entrance to the vagina of a virgin | - |
| marrowbone | 17 | a bone containing edible marrow; used especially in flavoring soup | - |
| marshaling | 16 | - | - |
| malefactor | 17 | someone who has committed a crime or has been legally convicted of a crime | - |
| maleficent | 17 | harmful or evil in intent or effect | - |
| meperidine | 15 | a synthetic narcotic drug (trade name Demerol) used to treat pain | - |
| metabolise | 14 | produce by metabolism | - |
| megalosaur | 13 | gigantic carnivorous bipedal dinosaur of the Jurassic or early Cretaceous in Europe | - |
| micrograph | 20 | - | - |
| mitigation | 13 | a partial excuse to mitigate censure; an attempt to represent an offense as less serious than it appears by showing mitigating circumstances | - |
| miscellany | 17 | a collection containing a variety of sorts of things | - |
| moralising | 13 | - | - |
| moistening | 13 | the act of making something slightly wet | - |
| modulating | 14 | - | - |
| mutability | 17 | the quality of being capable of mutation | - |
| mythomania | 20 | - | - |
| mountebank | 18 | a flamboyant deceiver; one who attracts customers with tricks or jokes | - |
| multilevel | 15 | of a building having more than one level | - |
| multiplier | 14 | the number by which a multiplicand is multiplied | - |
| mudslinger | 14 | one who spreads real or alleged scandal about another (usually for political advantage) | - |
| multifocal | 17 | - | - |
| maintainer | 12 | someone who upholds or maintains | - |
| marshalled | 16 | - | - |
| martyrized | 25 | - | - |
| mannerless | 12 | - | - |
| mediascape | 17 | - | - |
| megamerger | 16 | - | - |
| menstruant | 12 | - | - |
| mesolithic | 17 | middle part of the Stone Age beginning about 15,000 years ago | - |
| miconazole | 23 | an antifungal agent usually administered in the form of a nitrate (trade name Monistat) | - |
| microgreen | 15 | - | - |
| meadowfoam | 21 | - | - |
| marshberry | 20 | - | - |
| mainstreet | 12 | - | - |
| microproof | 19 | - | - |
| microtiter | 14 | - | - |
| modacrylic | 20 | - | - |
| monocausal | 14 | - | - |
| monohulled | 16 | - | - |
| motherlike | 19 | suggestive of or acting like a mother | - |
| motherlode | 16 | - | - |
| motorsport | 14 | - | - |
| mouthguard | 17 | - | - |
| muffaletta | 18 | - | - |
| mochaccino | 21 | - | - |
| moccasined | 17 | - | - |
| middlegame | 17 | - | - |
| midmorning | 16 | - | - |
| mildewcide | 19 | - | - |
| milligauss | 13 | - | - |
| mindfucker | 22 | - | - |
| misdeliver | 16 | deliver to the wrong address | - |
| missalette | 12 | - | - |
| moblogging | 17 | - | - |
| muffuletta | 18 | - | - |
| multiblade | 15 | - | - |
| multifront | 15 | - | - |
| multihomer | 17 | - | - |
| multitower | 15 | - | - |
| multivalve | 18 | - | - |
| mumblecore | 18 | - | - |
| muscleless | 14 | - | - |
| musclewood | 18 | - | - |
| museumgoer | 15 | - | - |
| mailbombed | 19 | - | - |
| misdieting | 14 | - | - |
| mobcasting | 17 | - | - |
| modafinils | 16 | - | - |
| modellists | 13 | - | - |
| mompreneur | 16 | - | - |
| monactines | 14 | - | - |
| moneybelts | 17 | - | - |
| moneyboxes | 24 | - | - |
| monophases | 17 | - | - |
| mistimings | 15 | - | - |
| missensing | 13 | - | - |
| misdighted | 18 | - | - |
| misdreaded | 15 | - | - |
| misfolding | 17 | - | - |
| misgenders | 14 | - | - |
| mishugases | 16 | - | - |
| mislabours | 14 | - | - |
| mismatings | 15 | - | - |
| misselling | 13 | - | - |
| monopodias | 15 | - | - |
| monoprints | 14 | - | - |
| monorhines | 15 | - | - |
| moscoviums | 19 | - | - |
| motheriest | 15 | - | - |
| motherlier | 15 | - | - |
| motoscafos | 17 | - | - |
| mourvedres | 16 | - | - |
| mousselike | 16 | - | - |
| muckymucks | 29 | - | - |
| mucolytics | 19 | - | - |
| mortariest | 12 | - | - |
| mortadelle | 13 | - | - |
| monotasked | 17 | - | - |
| mooncrafts | 17 | - | - |
| moosehairs | 15 | - | - |
| moosehides | 16 | - | - |
| morassiest | 12 | - | - |
| morgellons | 13 | - | - |
| morpholine | 17 | - | - |
| morpholino | 17 | - | - |
| mudhoppers | 20 | - | - |
| misassumes | 14 | - | - |
| matfellons | 15 | - | - |
| meiofaunae | 15 | - | - |
| meiofaunas | 15 | - | - |
| melastomes | 14 | - | - |
| mellowiest | 15 | - | - |
| meloxicams | 23 | - | - |
| menschiest | 17 | - | - |
| metaverses | 15 | - | - |
| methanoyls | 18 | - | - |
| megathrust | 16 | - | - |
| megastorms | 15 | - | - |
| matronlier | 12 | - | - |
| matteriest | 12 | - | - |
| meadowiest | 16 | - | - |
| meatpacker | 20 | - | - |
| medalplays | 18 | - | - |
| megachurch | 23 | - | - |
| megalodons | 14 | - | - |
| megaquakes | 26 | - | - |
| metrestick | 18 | a rule one meter long (usually marked off in centimeters and millimeters) | - |
| microbeads | 17 | - | - |
| microbiome | 18 | - | - |
| mildewiest | 16 | - | - |
| mindscapes | 17 | - | - |
| minelaying | 16 | laying explosive mines in concealed places to destroy enemy personnel and equipment | - |
| mineworker | 19 | laborer who works in a mine | - |
| minimarket | 18 | - | - |
| minisystem | 17 | - | - |
| mirrorings | 13 | - | - |
| midlanders | 14 | - | - |
| midibusses | 15 | - | - |
| microblogs | 17 | - | - |
| microdrone | 15 | - | - |
| microlitre | 14 | - | - |
| micromorts | 16 | - | - |
| microparty | 19 | - | - |
| microtubes | 16 | - | - |
| middelskot | 18 | - | - |
| middleware | 17 | - | - |
| misassumed | 15 | - | - |
| muffettees | 18 | - | - |
| mummiforms | 21 | - | - |
| mumpreneur | 16 | - | - |
| murderball | 15 | - | - |
| mustardier | 13 | - | - |
| muttoniest | 12 | - | - |
| myostatins | 15 | - | - |
| mummerings | 17 | - | - |
| multitools | 12 | - | - |
| mukhabarat | 21 | - | - |
| mullockier | 18 | - | - |
| multiculti | 14 | - | - |
| multigenes | 13 | - | - |
| multilines | 12 | - | - |
| multimodes | 15 | - | - |
| multipoint | 14 | - | - |
| multitoned | 13 | - | - |
| matchplays | 22 | - | - |
| machinimas | 19 | - | - |
| macrolides | 15 | - | - |
| maidenlier | 13 | - | - |
| mainprised | 15 | - | - |
| mainstages | 13 | - | - |
| marguerita | 13 | - | - |
| marketised | 17 | - | - |
| marketises | 16 | - | - |
| marketized | 26 | - | - |
| marketizes | 25 | - | - |
| marrowiest | 15 | - | - |
| marshelder | 16 | - | - |
| marvellers | 15 | - | - |
| maraudings | 14 | - | - |
| malpighias | 18 | - | - |
| manfullest | 15 | - | - |
| mannerlier | 12 | - | - |
| manoeuvers | 15 | - | - |
| manscaping | 17 | - | - |
| mansplains | 14 | - | - |
| manspreads | 15 | - | - |
| mantyhoses | 18 | - | - |
| masterlier | 12 | - | - |
| mentalists | 12 | - | - |
| mephitises | 17 | - | - |
| mephitisms | 19 | - | - |
| merbromins | 16 | - | - |
| mercaptans | 16 | - | - |
| mercaptide | 17 | - | - |
| mercerised | 15 | of cotton thread that has been treated with sodium hydroxide to shrink it and increase its luster and affinity for dye | - |
| merceriser | 14 | - | - |
| mephitical | 19 | - | - |
| mentations | 12 | - | - |
| menticides | 15 | - | - |
| mentioners | 12 | - | - |
| mentioning | 13 | - | - |
| mentorings | 13 | - | - |
| mentorship | 17 | - | - |
| menuisiers | 12 | - | - |
| mepacrines | 16 | - | - |
| mercerises | 14 | - | - |
| mercerized | 24 | of cotton thread that has been treated with sodium hydroxide to shrink it and increase its luster and affinity for dye | mercerized cotton |
| mercerizer | 23 | - | - |
| mercurized | 24 | - | - |
| mercurizes | 23 | - | - |
| merestones | 12 | - | - |
| mergansers | 13 | - | - |
| meridional | 13 | located in the south or characteristic of southern people or places | - |
| meritocrat | 14 | - | - |
| mermaidens | 15 | - | - |
| merogonies | 13 | - | - |
| mercurises | 14 | - | - |
| mercurised | 15 | - | - |
| mercerizes | 23 | - | - |
| merchanted | 18 | - | - |
| merchantry | 20 | - | - |
| mercifying | 21 | - | - |
| mercurated | 15 | - | - |
| mercurates | 14 | - | - |
| mercurials | 14 | - | - |
| meromyosin | 17 | - | - |
| mentalisms | 14 | - | - |
| melongenes | 13 | - | - |
| memorative | 17 | - | - |
| memorially | 17 | - | - |
| memorisers | 14 | - | - |
| memorising | 15 | - | - |
| memorizers | 23 | - | - |
| menadiones | 13 | - | - |
| memorabile | 16 | - | - |
| melphalans | 17 | - | - |
| meltwaters | 15 | - | - |
| melungeons | 13 | - | - |
| memberless | 16 | of a group or set having no members | - |
| membranous | 16 | characterized by formation of a membrane (or something resembling a membrane) | membranous gastritis |
| memoirisms | 16 | - | - |
| memoirists | 14 | - | - |
| menageries | 13 | - | - |
| menarcheal | 17 | - | - |
| menarchial | 17 | - | - |
| menopauses | 14 | - | - |
| menopausic | 16 | - | - |
| menorrheas | 15 | - | - |
| menorrhoea | 15 | - | - |
| menstruous | 12 | - | - |
| menstruums | 14 | - | - |
| mensurable | 14 | having notes of fixed rhythmic value | - |
| menominees | 14 | - | - |
| mendicancy | 20 | a solicitation for money or food (especially in the street by an apparently penniless person) | - |
| mendicants | 15 | - | - |
| meningitic | 15 | - | - |
| meniscuses | 14 | - | - |
| menologies | 13 | - | - |
| mentaleses | 12 | - | - |
| mesothelia | 15 | - | - |
| metabolome | 16 | - | - |
| metacarpus | 16 | the part of the hand between the carpus and phalanges | - |
| metacenter | 14 | (shipbuilding) the point of intersection between two vertical lines, one line through the center of buoyancy of the hull of a ship in equilibrium and the other line through the center of buoyancy of the hull when the ship is inclined to one side; the distance of this intersection above the center of gravity is an indication of the stability of the ship | - |
| metacentre | 14 | (shipbuilding) the point of intersection between two vertical lines, one line through the center of buoyancy of the hull of a ship in equilibrium and the other line through the center of buoyancy of the hull when the ship is inclined to one side; the distance of this intersection above the center of gravity is an indication of the stability of the ship | - |
| metaethics | 17 | - | - |
| metafemale | 17 | - | - |
| metabolite | 14 | any substance involved in metabolism (either as a product of metabolism or as necessary for metabolism) | - |
| mesothorax | 22 | - | - |
| messagings | 14 | - | - |
| messalines | 12 | - | - |
| messengers | 13 | - | - |
| messianism | 14 | - | - |
| mestranols | 12 | - | - |
| metabolies | 14 | - | - |
| metagalaxy | 23 | - | - |
| metalepses | 14 | - | - |
| metalepsis | 14 | substituting metonymy of one figurative sense for another | - |
| metalloids | 13 | - | - |
| metalmarks | 18 | - | - |
| metalsmith | 17 | - | - |
| metalwares | 15 | - | - |
| metalworks | 19 | factory where metal castings are produced | - |
| metamerism | 16 | - | - |
| metaphases | 17 | - | - |
| metallizes | 21 | - | - |
| metallized | 22 | - | - |
| metaleptic | 16 | - | - |
| metalheads | 16 | - | - |
| metalising | 13 | - | - |
| metalizing | 22 | - | - |
| metallings | 13 | - | - |
| metallised | 13 | - | - |
| metallises | 12 | - | - |
