The term "underground" in underground railroad means secret. It also was not a road. It was more like a trail. So I guess if you were to say it literally, you would say "secret trail."
Although a few parts of the network involved tunnels or underground hiding places, most of the "underground railroad" consisted of houses and farms of anti-slavery Southerners. They used these...
no. the underground railroad was a secret (underground) chain of people who would help slaves reach freedom. the "railroad" part of the underground railroad was simply a way to refer to the chain of...