Network and Underground railway

Network noun - A fabric made of strands loosely twisted, knotted, or woven together at regular intervals.

Underground railway and network are semantically related. In some cases you can use "Underground railway" instead a noun "Network".

Nearby Words: networked, networking

Underground railway noun - Secret aid to escaping slaves that was provided by abolitionists in the years before the American Civil War.

Network and underground railway are semantically related. Sometimes you can use "Network" instead a noun phrase "Underground railway".