| 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 |
| Mastocytosis | Mastocitosis |
| mastodon | mastodonte |
| Mastretta | Mastretta-Technoidea |
| Mastrils | Mastrils |
| masturbate | masturbarse |
| masturbation | paja |
| Masuccio Salernitano | Masuccio Salernitano |
| Masuji Ibuse | Masuji Ibuse |
| Masumi Asano | Masumi Asano |
| Masumi Itō | Masumi Itō |
| Masuria | Masuria |
| Masutatsu Ōyama | Masutatsu Oyama |
| Masvingo | Provincia de Masvingo |
| Maszoperia | Sociedad |
| mat | estera |
| Mat boom | Perca fluviatilis |
| Mat District | Distrito de Mat |
| Mata Amritanandamayi | Mata Amritanandamayi |
| Mata Hari | Mata Hari |
| Mata mata | Chelus fimbriatus |
| Mata-Utu | Mata-Utu |
| Matabeleland North | Matabelelandia Septentrional |
| Matabeleland South | Matabelelandia Meridional |
| matador | matador |
| Matagalpa | Departamento de Matagalpa |
| Matagh | Matagh |
| Mataiva | Mataiva |
| Matam Department | Región de Matam |
| Matam Region | Región de Matam |
| Matamoros | Heroica Matamoros |
| Matanza River | Río Matanza |
| Matanzas | Matanzas |
| Matanzas Province | Provincia de Matanzas |
| Mataró | Mataró |
| Mataura River | Río Mataura |
| Mataveri International Airport | Aeropuerto Internacional Mataveri |
| match | correspondencia |
| match point | punto decisivo |
| matchbox | caja de fósforos |
| Matchbox Twenty | Matchbox Twenty |
| matched | asonante |
| Matches | Fósforo |
| matching | correspondiente |
| matchless | sin par |
| matchmaker | casamentero |
| matchwood | astillas |
| mate | colega |
