| Words | Synonyms | Antonyms |
| Magnificent | glorious, splendid, grand, noble, outstanding | atrocious, shameful, awful |
| Majestic | august, imposing, grandiose, lordly, stately, sublime | shabby, low, humble |
| Mammoth | colossal, enormous, huge, prodigious, mighty, heroic | little, miniature, tiny |
| Marvel | miracle, phenomenon, prodigious, mighty, heroic | anticipation, normalcy, usualness |
| Masculine | macho, male, manly, manlike, mannish, virile | feminine, ladylike,womanly |
| Meager | scant, skimpy, sparse, tiny, lanky, slim | plenty, substantial, sufficient |
| Mean | malevolent, spiteful, vicious, ignoble, sordid, niggard | affectionate, gentle, dignified |
| Mediocre | average, common, plain, standard, mean, shabby | exceptional, unusual, extraordinary |
| Mentor | advisor, consultant, counselor, trainer, coach, guide | adversary, opponent, student |
| Merge | blend, fuse, mingle, amalgamate, stir, mix | divide, separate, part |
| Meticulous | careful, painstaking, scrupulous, fussy, choosy, particular | careless, sloppy, unorganized |
| Midst | centre, median, middle, midpoint, deep, interior | exterior, outside, outer |
| Minute | diminutive, dwarf, minuscule, tiny, pygmy, wee | giant, huge, mighty |
| Miserly | close-fisted, niggard, parsimonious, penurious, stingy, pinching | generous, lavish, prodigal |
| Misfortune | adversity, haplessness, affliction, casualty, mishap, unluckiness | blessing, fortune, favor |
| Mislead | beguile, betray, deceive, dupe, hoodwink, trick | guide, counsel, lead |
| Mock | deride, gibe, jeer, ridicule, imitate, | flatter, praise, exalt |
| Moderate | modest, reasonable, temperate, conservative, restrained, mild | outrageous, considerable, significant |
| Monopoly | cartel, consortium, holding, syndicate, trust, corner | sharing, distribution, scattering |
| Monstrous | atrocious, heinous, gruesome, scandalous, gigantic, mighty | average, common, cultured |
| Motivate | goad, impel, prod, prick, spur, stimulate | depress, dissuade, impede |
| Muddy | murky, rolled, turbid, cloudy, drab, murky | bright, lucid, explicit |
| Mute | dumb, inarticulate, mum, silent, voiceless, wordless | articulate, communicative, vocal |
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