macadamize – To cover or pave, as a path or roadway, with small broken stone.
machinery – The parts of a machine or engine, taken collectively.
machinist – One who makes or repairs machines, or uses metal-working tools.
macrocosm – The whole of any sphere or department of nature or knowledge to which man is related.
madden – To inflame with passion.
Madonna – A painted or sculptured representation of the Virgin, usually with the infant Jesus.
magician – A sorcerer.
magisterial – Having an air of authority.
magistracy – The office or dignity of a magistrate.
magnanimous – Generous in treating or judging others.
magnate – A person of rank or importance.
magnet – A body possessing that peculiar form of polarity found in nature in the lodestone.
magnetize – To make a magnet of, permanently, or temporarily.
magnificence – The exhibition of greatness of action, character, intellect, wealth, or power.
magnificent – Grand or majestic in appearance, quality, or action.
magnitude – Importance.
maharaja – A great Hindu prince.
maidenhood – Virginity.
maintain – To hold or preserve in any particular state or condition.
maintenance – That which supports or sustains.
maize – Indian corn: usually in the United States called simply corn.
makeup – The arrangements or combination of the parts of which anything is composed.
malady – Any physical disease or disorder, especially a chronic or deep-seated one.
malaria – A fever characterized by alternating chills, fever, and sweating.
malcontent – One who is dissatisfied with the existing state of affairs.
malediction – The calling down of a curse or curses.
malefactor – One who injures another.
maleficent – Mischievous.
malevolence – Ill will.
malevolent – Wishing evil to others.
malign – To speak evil of, especially to do so falsely and severely.
malignant – Evil in nature or tending to do great harm or mischief.
malleable – Pliant.
mallet – A wooden hammer.
maltreat – To treat ill, unkindly, roughly, or abusively.
man-trap – A place or structure dangerous to human life.
mandate – A command.
mandatory – Expressive of positive command, as distinguished from merely directory.
mane – The long hair growing upon and about the neck of certain animals, as the horse and the lion.
man-eater – An animal that devours human beings.
maneuver – To make adroit or artful moves: manage affairs by strategy.
mania – Insanity.
maniac – a person raving with madness.
manifesto – A public declaration, making announcement, explanation or defense of intentions, or motives.
manlike – Like a man.
manliness – The qualities characteristic of a true man, as bravery, resolution, etc.
mannerism – Constant or excessive adherence to one manner, style, or peculiarity, as of action or conduct.
manor – The landed estate of a lord or nobleman.
mantel – The facing, sometimes richly ornamented, about a fireplace, including the usual shelf above it.
mantle – A cloak.
manufacturer – A person engaged in manufacturing as a business.
manumission – Emancipation.
manumit – To set free from bondage.
marine – Of or pertaining to the sea or matters connected with the sea.
maritime – Situated on or near the sea.
maroon – To put ashore and abandon (a person) on a desolate coast or island.
martial – Pertaining to war or military operations.
Martian – Pertaining to Mars, either the Roman god of war or the planet.
martyrdom – Submission to death or persecution for the sake of faith or principle.
marvel – To be astonished and perplexed because of (something).
masonry – The art or work of constructing, as buildings, walls, etc., with regularly arranged stones.
masquerade – A social party composed of persons masked and costumed so as to be disguised.
massacre – The unnecessary and indiscriminate killing of human beings.
massive – Of considerable bulk and weight.
masterpiece – A superior production.
mastery – The attainment of superior skill.
material – That of which anything is composed or may be constructed.
materialize – To take perceptible or substantial form.
maternal – Pertaining or peculiar to a mother or to motherhood.
matinee – An entertainment (especially theatrical) held in the daytime.
matricide – The killing, especially the murdering, of one’s mother.
matrimony – The union of a man and a woman in marriage.
matrix – That which contains and gives shape or form to anything.
matter of fact – Something that has actual and undeniable existence or reality.
maudlin – Foolishly and tearfully affectionate.
mausoleum – A tomb of more than ordinary size or architectural pretensions.
mawkish – Sickening or insipid.
maxim – A principle accepted as true and acted on as a rule or guide.
maze – A labyrinth.
mead – A meadow.
meager – scanty.
mealy-mouthed – Afraid to express facts or opinions plainly.
meander – To wind and turn while proceeding in a course.
mechanics – The branch of physics that treats the phenomena caused by the action of forces.
medallion – A large medal.
meddlesome – Interfering.
medial – Of or pertaining to the middle.
mediate – To effect by negotiating as an agent between parties.
medicine – A substance possessing or reputed to possess curative or remedial properties.
medieval – Belonging or relating to or descriptive of the middle ages.
mediocre – Ordinary.
meditation – The turning or revolving of a subject in the mind.
medley – A composition of different songs or parts of songs arranged to run as a continuous whole.
meliorate – To make better or improve, as in quality or social or physical condition.
mellifluous – Sweetly or smoothly flowing.
melodious – Characterized by a sweet succession of sounds.
melodrama – A drama with a romantic story or plot and sensational situation and incidents.
memento – A souvenir.
memorable – Noteworthy.
menace – A threat.
menagerie – A collection of wild animals, especially when kept for exhibition.
mendacious – Untrue.
mendicant – A beggar.
mentality – Intellectuality.
mentor – A wise and faithful teacher, guide, and friend.
mercantile – Conducted or acting on business principles; commercial.
mercenary – Greedy
merciful – Disposed to pity and forgive.
merciless – Cruel.
meretricious – Alluring by false or gaudy show.
mesmerize – To hypnotize.
messieurs – pl. Gentlemen.
metal – An element that forms a base by combining with oxygen, is usually hard, heavy, and lustrous.
metallurgy – The art or science of extracting a metal from ores, as by smelting.
metamorphosis – A passing from one form or shape into another.
metaphor – A figure of speech in which one object is likened to another, by speaking as if the other.
metaphysical – Philosophical.
metaphysician – One skilled in metaphysics.
metaphysics – The principles of philosophy as applied to explain the methods of any particular science.
mete – To apportion.
metempsychosis – Transition of the soul of a human being at death into another body, whether human or beast.
meticulous – Over-cautious.
metonymy – A figure of speech that consists in the naming of a thing by one of its attributes.
metric – Relating to measurement.
metronome – An instrument for indicating and marking exact time in music.
metropolis – A chief city, either the capital or the largest or most important city of a state.
metropolitan – Pertaining to a chief city.
mettle – Courage.
mettlesome – Having courage or spirit.
microcosm – The world or universe on a small scale.
micrometer – An instrument for measuring very small angles or dimensions.
microphone – An apparatus for magnifying faint sounds.
microscope – An instrument for assisting the eye in the vision of minute objects or features of objects.
microscopic – Adapted to or characterized by minute observation.
microscopy – The art of examing objects with the microscope.
midsummer – The middle of the summer.
midwife – A woman who makes a business of assisting at childbirth.
mien – The external appearance or manner of a person.
migrant – Wandering.
migrate – To remove or pass from one country, region, or habitat to another.
migratory – Wandering.
mileage – A distance in miles.
militant – Of a warlike or combative disposition or tendency.
militarism – A policy of maintaining great standing armies.
militate – To have weight or influence (in determining a question).
militia – Those citizens, collectively, who are enrolled and drilled in temporary military organizations.
Milky Way – The galaxy.
millet – A grass cultivated for forage and cereal.
mimic – To imitate the speech or actions of.
miniature – Much smaller than reality or that the normal size.
minimize – To reduce to the smallest possible amount or degree.
minion – A servile favorite.
ministration – Any religious ceremonial.
ministry – A service.
minority – The smaller in number of two portions into which a number or a group is divided.
minute – Exceedingly small in extent or quantity.
minutia – A small or unimportant particular or detail.
mirage – An optical effect looking like a sheet of water in the desert.
misadventure – An unlucky accident.
misanthropic – Hating mankind.
misanthropy – Hatred of mankind.
misapprehend – To misunderstand.
misbehave – To behave ill.
misbehavior – Ill or improper behavior.
mischievous – Fond of tricks.
miscount – To make a mistake in counting.
miscreant – A villain.
misdeed – A wrong or improper act.
misdemeanor – Evil conduct, small crime.
miser – A person given to saving and hoarding unduly.
mishap – Misfortune.
misinterpret – To misunderstand.
mislay – To misplace.
mismanage – To manage badly, improperly, or unskillfully.
misnomer – A name wrongly or mistakenly applied.
misogamy – Hatred of marriage.
misogyny – Hatred of women.
misplace – To put into a wrong place.
misrepresent – To give a wrong impression.
misrule – To misgovern.
missal – The book containing the service for the celebration of mass.
missile – Any object, especially a weapon, thrown or intended to be thrown.
missive – A message in writing.
mistrust – To regard with suspicion or jealousy.
misty – Lacking clearness
misunderstand – To Take in a wrong sense.
misuse – To maltreat.
mite – A very small amount, portion, or particle.
miter – The junction of two bodies at an equally divided angle.
mitigate – To make milder or more endurable.
mnemonics – A system of principles and formulas designed to assist the recollection in certain instances.
moat – A ditch on the outside of a fortress wall.
mobocracy – Lawless control of public affairs by the mob or populace.
moccasin – A foot-covering made of soft leather or buckskin.
mockery – Ridicule.
moderation – Temperance.
moderator – The presiding officer of a meeting.
modernity – The state or character of being modern.
modernize – To make characteristic of the present or of recent times.
modification – A change.
modify – To make somewhat different.
modish – Fashionable.
modulate – To vary in tone, inflection, pitch or other quality of sound.
mollify – To soothe.
molt – To cast off, as hair, feathers, etc.
momentary – Lasting but a short time.
momentous – Very significant.
momentum – An impetus.
monarchy – Government by a single, sovereign ruler.
monastery – A dwelling-place occupied in common by persons under religious vows of seclusion.
monetary – Financial.
mongrel – The progeny resulting from the crossing of different breeds or varieties.
monition – Friendly counsel given by way of warning and implying caution or reproof.
monitory – Admonition or warning.
monocracy – Government by a single person.
monogamy – The habit of pairing, or having but one mate.
monogram – A character consisting of two or more letters interwoven into one, usually initials of a name.
monograph – A treatise discussing a single subject or branch of a subject.
monolith – Any structure or sculpture in stone formed of a single piece.
monologue – A story or drama told or performed by one person.
monomania – The unreasonable pursuit of one idea.
monopoly – The control of a thing, as a commodity, to enable a person to raise its price.
monosyllable – A word of one syllable.
monotone – The sameness or monotony of utterance.
monotonous – Unchanging and tedious.
monotony – A lack of variety.
monsieur – A French title of respect, equivalent to Mr. and sir.
monstrosity – Anything unnaturally huge or distorted.
moonbeam – A ray of moonlight.
morale – A state of mind with reference to confidence, courage, zeal, and the like.
moralist – A writer on ethics.
morality – Virtue.
moralize – To render virtuous.
moratorium – An emergency legislation authorizing a government suspend some action temporarily.
morbid – Caused by or denoting a diseased or unsound condition of body or mind.
mordacious – Biting or giving to biting.
mordant – Biting.
moribund – On the point of dying.
morose – Gloomy.
morphology – the science of organic forms.
motley – Composed of heterogeneous or inharmonious elements.
motto – An expressive word or pithy sentence enunciating some guiding rule of life, or faith.
mountaineer – One who travels among or climbs mountains for pleasure or exercise.
mountainous – Full of or abounding in mountains.
mouthful – As much as can be or is usually put into the or exercise.
muddle – To confuse or becloud, especially with or as with drink.
muffle – To deaden the sound of, as by wraps.
mulatto – The offspring of a white person and a black person.
muleteer – A mule-driver.
multiform – Having many shapes, or appearances.
multiplicity – the condition of being manifold or very various.
mundane – Worldly, as opposed to spiritual or celestial.
municipal – Of or pertaining to a town or city, or to its corporate or local government.
municipality – A district enjoying municipal government.
munificence – A giving characterized by generous motives and extraordinary liberality.
munificent – Extraordinarily generous.
muster – An assemblage or review of troops for parade or inspection, or for numbering off.
mutation – The act or process of change.
mutilate – To disfigure.
mutiny – Rebellion against lawful or constituted authority.
myriad – A vast indefinite number.
mystic – One who professes direct divine illumination, or relies upon meditation to acquire truth.
mystification – The act of artfully perplexing.
myth – A fictitious narrative presented as historical, but without any basis of fact.
mythology – The whole body of legends cherished by a race concerning gods and heroes.