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| Subject | English | Spanish |
| transp., mech.eng. | cog belt | correa de espiga |
| transp. | cog railway | cremallera |
| transp. | cog railway | ferrocarril de cremallera |
| transp. | cog railway | ferrocarril a cremallera |
| mech.eng. | cog wheel | rueda dentada |
| tech. | cog wheel | diente de rueda |
| tech. | cog wheel | rueda dentada (siempre que no sea un engranaje) |
| tech. | cog wheel | diente de piñón |
| chem. | cog wheeled crusher | trituradora de rueda dentada |
| comp., MS | COGS account | cuenta Costo de productos vendidos (An account that tracks the cost of goods, materials, or services entered into inventory and sold) |
| mech.eng. | gear-ring cog wheel | volante de corona dentada |
| tech. | hunting cog | diente suplementario |
| tech. | hunting cog | diente adicional de engranajes |
| tech. | lifter cog | leva de eje giratorio |
| agric. | marking cog | martillo marcador |