| massimo comune divisore | M.C.D. |
| Massimo di Hispania | Máximo de Hispania |
| Massimo Oddo | Massimo Oddo |
| Massinissa | Masinisa |
| Massive Attack | Massive Attack |
| Massively multiplayer online game | MMORPG |
| masso | roca |
| massone | francmasón |
| massoneria | francmasonería |
| Massongex | Massongex |
| massonico | masónico |
| Massonnens | Massonnens |
| Massospondylus carinatus | Massospondylus |
| Massoteres | Masoteras |
| Mastaba | Mastaba |
| mastectomia | mastectomía |
| mastello | tina |
| Master | Maestro |
| Master boot record | Master Boot Record |
| Master in Business Administration | MBA |
| Master of Magic | Master of Magic |
| Master of Reality | Master of Reality |
| Master Series | ATP Masters Series |
| Master Sword | Espada Maestra |
| Master universitario | Maestro |
| MasterCard | MasterCard |
| Mastering | Masterizacion |
| Masters of Horror | Masters of Horror |
| Masters of the Universe | Amos del Universo |
| Masters Series Cup | Tennis Masters Cup |
| masticare | mascar |
| masticazione | mascadura |
| mastice | masilla |
| Mastiff | Moloso |
| mastino | mastín |
| Mastino dei Pirenei | Mastín del Pirineo |
| mastino inglese | mastín |
| Mastino napoletano | Mastín napolitano |
| Mastino spagnolo | Mastín español |
| mastino tibetano | mastín tibetano |
| mastite | mastitis |
| mastodonte | mastodonte |
| Mastretta | Mastretta-Technoidea |
| Mastrils | Mastrils |
| masturbare | cascar |
| masturbarsi | masturbarse |
| masturbazione | paja |
| Masuccio Salernitano | Masuccio Salernitano |
| Masuharte | Masaharta |
| Masuria | Masuria |
| Masvingo | Provincia de Masvingo |
| Mat | Distrito de Mat |
| Mata Hari | Mata Hari |
| Mata-Utu | Mata-Utu |
| Matabeleland North | Matabelelandia Septentrional |
| matador | matador |
| Matanzas | Provincia de Matanzas |
| Matarraña | Matarraña |
| Mataró | Mataró |
| matassa | madeja |
