| M.C.D. | hcf |
| ma | but |
| ma dai | come off it |
| Ma mère | Ma mère |
| ma va! | shut up |
| ma va' | well I'll be damned |
| ma va_ | duh |
| Ma vie en rose | Ma vie en rose |
| Ma$e | Ma$e |
| MAA | Earth |
| Maag Tammeka Tartu | JK Maag Tammeka Tartu |
| Maakhir | Maakhir |
| Maamme | Maamme |
| Maaninka | Maaninka |
| Maarbale | Maharbal |
| Maardu | Maardu |
| Maarssen | Maarssen |
| Maarten Schmidt | Maarten Schmidt |
| Maarten Stekelenburg | Maarten Stekelenburg |
| Maarten van Heemskerck | Marten Jacobszoon Heemskerk van Veen |
| Maasin | Maasin City |
| Maastricht | Maastricht |
| Maastrichtiano | Maastrichtian |
| Maatibra | Hakor |
| Maatra | Kashta |
| Mab | Mab |
| Mabinogion | Mabinogion |
| Mably | Gabriel Bonnet de Mably |
| Mac Cuill | Mac Cuill |
| MAC flooding | MAC flooding |
| Mac mini | Mac mini |
| Mac OS | Mac OS |
| Mac OS Roman | Mac OS Roman |
| Mac OS X | Mac OS X |
| macabro | macabre |
| Macabro quiz | Cat Among the Pigeons |
| Macaca fuscata | Japanese Macaque |
| Macaca nemestrina | Southern Pig-tailed Macaque |
| Macaca nigra | Celebes Crested Macaque |
| Macaca silenus | Lion-tailed Macaque |
| macadam al catrame | tarmac |
| Macadamia | Macadamia |
| Macallè | Mekele |
| Macao | Macau |
| Macao SAR | Macau SAR |
| Macapá | Macapá |
| Macaronesia | Macaronesia |
| Macarsca | Makarska |
| Macaulay Culkin | Macaulay Culkin |
| Macbeth | Macbeth |
| MacBook | MacBook |
| MacBook Pro | MacBook Pro |
| Maccabei | Maccabees |
| Maccabi Tel Aviv | Maccabi Tel Aviv |
| Maccabiadi | Maccabiah Games |
| Maccartismo | McCarthyism |
| maccheroni | macaroni |
| macchia | mark |
| macchia d'unto | smear |
| macchia di fuliggine | smut |
| macchia di sangue | bloodstain |
| Macchia mediterranea | Maquis shrubland |
| Macchia Nera | Phantom Blot |
| macchia solare | sunspot |
| macchiare | blot |
| macchiarsi | stain |
