Border line
Bound and border line are semantically related. In some cases you can use "Bound" instead a noun phrase "Border line".
Bound
Bound noun - A real or imaginary point beyond which a person or thing cannot go.
Cite this Source
Bound and Border line. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/border_line/bound
Border line & Bound. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/border_line/bound>.
Bound or Border line. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/border_line/bound.
Google Ngram Viewer shows how "border line" and "bound" have occurred on timeline