| Masoretic Text | Masoreta |
| Masorti | Judaísmo conservador |
| Masovia | Mazovia |
| Masovian Blessed Virgin Mary Cathedral | Catedral |
| Masovian Voivodeship | Mazovia |
| masquerade | mascarada |
| mass | cantidad |
| mass communication | comunicación en masa |
| Mass concentration | Mascon |
| Mass conservation | Ley de conservación de la masa |
| Mass exchange | Intercambio de masas |
| Mass exodus | Éxodo |
| Mass flow | Flujo de masa |
| Mass flow rate | Gasto másico |
| Mass function | Función de masa |
| mass hysteria | histerismo colectivo |
| Mass in B Minor | Misa en si menor |
| Mass in C major | Misa en Do mayor |
| Mass in special relativity | Masa relativista |
| Mass loss | Pérdida de masa |
| mass media | medios de comunicación |
| Mass migration | Periodo de las grandes migraciones |
| mass movement | movimiento en masa |
| Mass number | Número másico |
| mass production | producción en serie |
| Mass radius relation | Relación masa-radio |
| Mass ratio | Relación de masas |
| mass recreation | actividades recreativas multitudinarias |
| Mass spectrometry | Espectrómetro de masa |
| Mass storage device | Memoria de gran capacidad |
| Mass transfer | Transferencia de masa |
| mass transport | transporte de masa |
| mass-produce | producir en serie |
| Massa | Massa |
| Massa language | Massa |
| Massachusett | Massachusett |
| Massachusetts | Massachusetts |
| Massachusetts General Hospital | Hospital General de Massachusetts |
| Massachusetts Institute of Technology | Instituto Tecnológico de Massachusetts |
| Massachusetts State House | Casa del Estado de Massachusetts |
| Massachusetts Supreme Judicial Court | Corte Suprema Judicial de Massachusetts |
| massacre | matanza |
| Massacre of the Innocents | Día de los Santos Inocentes |
| massage | masaje |
| Massagetae | Masageta |
| Massagno | Massagno |
| Massalfassar | Masalfasar |
| Massalia | Massalia |
| Massamagrell | Masamagrell |
| Massanassa | Masanasa |
| Massari | Massari |
| Massawa | Massawa |
| Masse moléculaire | Masa molecular |
| Massecuite | Diabetes mellitus |
| masseur | masajista |
| masseuse | masajista |
| massif | macizo |
| Massif Central | Macizo Central |
| Massimo Oddo | Massimo Oddo |
| Massiness | Gravedad |
| massive | imponente |
| Massive Attack | Massive Attack |
| Massive blackout in France | Europa estuvo al borde del colapso eléctrico por culpa del apagón |
| Massive earthquakes strike Indonesia | Terremotos mayores sacuden Indonesia |
| Massive galaxy | Galaxia masiva |
| Massive object | Objeto masivo |
| Massive retaliation | Doctrina Eisenhower |
| Massive star | Estrella masiva |
| Massively multiplayer online game | MMORPG |
| Massively multiplayer online role-playing game | MMORPG |
| Massongex | Massongex |
| Massonnens | Massonnens |
| Massospondylus | Massospondylus |
| mast | mástil |
| mastectomy | mastectomía |
| master | patrón |
| master boot record | registro maestro de arranque |
| master card | triunfo |
| Master Chief | Jefe Maestro |
| master file | archivo maestro |
| master key | llave maestra |
| Master of a school | Maestro |
| master of Arts | maestro en humanidades |
| Master of Business Administration | MBA |
| master of ceremonies | maestro de ceremonias |
| master of ceremony | maestro de ceremonias |
| Master of Magic | Master of Magic |
| Master of Moulins | Maestro de Moulins |
| Master of Orion II | Master of Orion |
| Master of Orion III | Master of Orion |
| Master of Reality | Master of Reality |
| Master of Science | maestro en ciencias |
| Master of the Horse | Magister Equitum |
| master of the house | el señor de la casa |
| Master of the Order of Preachers | Maestros Generales de la Orden de Predicadores |
| Master recording | Máster de grabación |
| Master Sword | Espada Maestra |
| Master's | maestría |
| Master's degree | maestría |
| masterful | dominante |
| masterly | hábil |
| mastermind | cerebro |
| masterpiece | obra maestra |
| Masterpieces of the Oral and Intangible Heritage of Humanity | Obras Maestras del Patrimonio Oral e Intangible de la Humanidad |
| Masters athletics | Máster |
| Masters of Horror | Masters of Horror |
| Masters of the Universe | Amos del Universo |
| masterstroke | golpe maestro |
| mastery | maestría |
| mastery of a language | dominio de un idioma |
| mastic | masilla |
| Mastic gum | Pistacia lentiscus |
| masticate | mascar |
| masticating | mascadura |
| mastication | masticación |
| Mastication roller | Cilindro |
| mastiff | mastín |
| mastitis | mastitis |
