Fastnesses
Trenches and fastnesses are semantically related. In some cases you can use "Trenches" instead a noun "Fastnesses".
Trenches
Fastnesses and trenches are semantically related. Sometimes you can use "Fastnesses" instead a noun "Trenches".
Mutual synonyms
Cite this Source
Trenches and Fastnesses. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/fastnesses/trenches
Fastnesses & Trenches. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/fastnesses/trenches>.
Trenches or Fastnesses. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/fastnesses/trenches.
Google Ngram Viewer shows how "fastnesses" and "trenches" have occurred on timeline