Frontier
Frontier noun - A region along the dividing line between two countries.
Outer limit and frontier are semantically related. In some cases you can use "Outer limit" instead a noun "Frontier".
Nearby Word: frontiersman
Outer limit
Frontier and outer limit are semantically related. You can use "Frontier" instead a noun phrase "Outer limit".
Mutual synonyms
Related pairs
Cite this Source
Outer limit and Frontier. (2016). Retrieved 2026, August 11, from https://thesaurus.plus/related/frontier/outer_limit
Frontier & Outer limit. N.p., 2016. Web. 11 Aug. 2026. <https://thesaurus.plus/related/frontier/outer_limit>.
Outer limit or Frontier. 2016. Accessed August 11, 2026. https://thesaurus.plus/related/frontier/outer_limit.
Google Ngram Viewer shows how "frontier" and "outer limit" have occurred on timeline