This is the 11568th most frequent Spanish word.
ferrocarril
"Ferrocarril" means "railway" or "railroad" in English.
Here, 'ferrocarril' is used in its general sense to refer to the railway system as a mode of transportation.
El ferrocarril es un medio de transporte para largas distancias.
The railroad is a means of transportation for long distances.
In this sentence, 'ferrocarril' refers to a specific railway line constructed for a purpose.
Construyeron un ferrocarril para conectar las dos ciudades importantes.
They built a railroad to connect the two important cities.
Here, 'ferrocarril' refers to a train, particularly the type of locomotive used historically.