| machination | maquinación |
| machinator | zascandil |
| machine | máquina |
| Machine bed | Banco |
| machine code | código máquina |
| Machine de Marly | Máquina de Marly |
| Machine epsilon | Epsilon de la máquina |
| machine gun | ametralladora |
| machine language | lenguaje de máquina |
| machine manufacture | industria de la maquinaria |
| Machine taper | Cono Morse |
| Machine translation | Traducción automática |
| Machine-code | Lenguaje de máquina |
| machinery | máquina |
| Machinga District | Distrito de Machinga |
| Machinima | Machinima |
| machinist | maquinista |
| Machinist vise | Torno |
| machismo | machismo |
| Machiya | Machiya |
| macho | macho |
| Machu Picchu | Machu Picchu |
| Maciej Żurawski | Maciej Żurawski |
| macintosh | impermeable |
| Macintosh Finder | Macintosh Finder |
| Maciste | Macisto |
| mack | impermeable |
| Mack the Knife | Die Dreigroschenoper |
| Mackenzie | Río Mackenzie |
| Mackenzie King Island | Isla Mackenzie King |
| Mackenzie Mountains | Río Mackenzie |
| Mackenzie River | Río Mackenzie |
| Mackenzie-Papineau Battalion | Batallón Mackenzie-Papineau |
| mackerei | caballa |
| mackerel | caballa |
| Mackinac Island | Isla Mackinac |
| mackintosh | impermeable |
| Macle | Macla |
| MacPherson strut | Suspensión MacPherson |
| Macquarie | Isla Macquarie |
| Macquarie Island | Isla Macquarie |
| Macquarie Pass National Park | Parque Nacional Paso de Macquarie |
| Macquarie River | Isla Macquarie |
| macrame | agremán |
| macramé | agremán |
| Macrauchenia | Macrauchenia patachonica |
| Macrianus Major | Macriano el Viejo |
| Macrianus Minor | Macriano el Joven |
| Macrinus | Macrino |
| macro | macroinstrucción |
| Macro spicule | Macroespícula |
| Macro substitution | Macro |
| macrobiotic | macrobiótico |
| macrocosm | macrocosmo |
| macroeconomic goal | objetivo macroeconómico |
| macroeconomics | macroeconomía |
| Macrolepidoptera | Macrolepidoptera |
| Macrolide | Macrólido |
| Macromedia Authorware | Macromedia Authorware |
| Macromedia FlashPaper | Macromedia Flashpaper |
| Macromedia FreeHand | Macromedia FreeHand |
| Macromedia HomeSite | Macromedia HomeSite |
| Macromutation | Macromutación |
| Macropedius | Georgius Macropedius |
| Macrophilia | Macrofilia |
| macrophyte | macrofito |
| Macroplaza | Macroplaza |
| Macropodiformes | Diprotodontia |
| Macropsia | Macropsia |
| Macropus | Macropus |
| macroscopic | macroscópico |
| Macross | Super Dimensional Fortress Macross |
| Macross Plus | Macross plus |
| Macross Zero | Macross Zero |
| Macrothylacia rubi | Gulo gulo |
| Macroturbulence | Macroturbulencia |
| Macrovipera | Macrovipera |
| Mactan | Isla de Mactan |
| maculate | mancillar |
| mad | insensato |
| mad as a hornet | furibundo |
| mad as a wet hen | furibundo |
