Boundary
Lines
Mutual synonyms
Both words in one sentence
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Geography geek side-note here: Hawai'i is unique among the 46-States-and-4-Commonwealths comprising the USA in having no straight-lines anywhere on its boundary.
Source: Useful Notes / Hawai'i -
Artistic License Law: Part of the robbers' getaway plan was to cross state lines, apparently expecting the police that were hot on their tails to suddenly break off pursuit at that invisible boundary.
Source: Western Animation / The Nut Job - Somewhat similarly to Yeovil Junction, New Jersey Transit's Secaucus Junction station, while actually within the formal boundary of Secaucus, but pretty far away from everything on significance in Secaucus, and also not actually a formal railroad junction: trains can't switch between lines there.
Source: Non Indicative Name / Real Life
Cite this Source
Lines and Boundary. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/boundary/lines
Boundary & Lines. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/boundary/lines>.
Lines or Boundary. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/boundary/lines.
Google Ngram Viewer shows how "boundary" and "lines" have occurred on timeline