Train station. Subway is under ground and train station is overground.
a bridge
Subway is a compound word.
the Japanese word for subway is : fuyukpu
Subway is a noun.
The subway was full of people.
souterrain
The doctor hurried on to the subway right before the doors closed.
I'm gonna get a £3 sub from Subway with a free drink!
No, the word subway is a noun, a singular, common, concrete noun; a word for a rail system that runs underground; a word for a thing. The exception is Subway Sandwich Shops, which is a proper, concrete noun; the name of a specific company and specific stores; also a word for a thing or things.
what word is opposite of prudent
The opposite of anything is it's absence. Silence would be the opposite of a word spoken.
If you mean an underground railroad, the usual word in the U. S. is "subway." (Not to be confused with subway in England, which is an "underpass" in the U. S.)