Monorail and Underground railway

Monorail

Monorail noun - A railway having a single track.
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Synonyms for Monorail

Underground railway and monorail are semantically related in train line topic. In some cases you can use "Underground railway" instead a noun "Monorail".

Underground railway

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

Monorail and underground railway are semantically related in train line topic. You can use "Monorail" instead a noun phrase "Underground railway".
Cite this Source
Underground railway and Monorail. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/monorail/underground_railway
Monorail & Underground railway. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/monorail/underground_railway>.
Underground railway or Monorail. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/monorail/underground_railway.
Google Ngram Viewer shows how "monorail" and "underground railway" have occurred on timeline