231 entries under noun topic. ×

4
acme(limit, edge)
4
apex(limit, edge)
4
border line(expression, idiom)
4
circuit(area, limit, scope, range)
4
curb(verb, edge)
4
enclosure(area, limit, scope, division)
4
line of demarcation(expression, idiom, limit, border)
4
marches
4
maximum(limit, edge)
4
sharpness
4
zenith(limit, edge)
3
boundaries
3
ceiling
3
coast
3
crease
3
demarcation(mark, split, class, edge)
3
divide(break, split, disagreement, class)
3
environs(area, limit, scope, range)
3
hedge(shelter, border, barrier, panel)
3
landmark
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APASmart Define. (2015). boundary thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/boundary/thesaurus/synonyms
ChicagoSmart Define. 2015. "boundary thesaurus" https://smartdefine.org/boundary/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, boundary thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/boundary/thesaurus/synonyms>.
MLASmart Define. "boundary thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/boundary/thesaurus/synonyms>