What is another word for underground route?
Pronunciation: [ˌʌndəɡɹˈa͡ʊnd ɹˈuːt] (IPA) 
An underground route can be defined as a pathway that is situated beneath the surface level, and is often considered to be out of sight. There are a variety of synonyms that can be used to describe an underground route. For instance, it can be called a subterranean passage, tunnel, or covert path. Additionally, a secret passageway, vault, or catacomb can also be used to describe an underground route that is hidden away from plain sight. These alternatives allow one to vary their descriptions to better suit the specific scenario, and can help to add depth and nuance to one's writing or descriptions.
