25 entries under noun topic. ×

17
center(verb, point, loose, outside)
12
middle(adjective, extreme, center, central)
10
inside(adjective, preposition, center)
7
interior(adjective, center)
7
core
6
area
3
territory
2
heart(body, cruelty, cowardice)
2
mainland
1
eye
0
region
-1
centrists
-1
centrality
-1
centre
-1
gist
-1
inwardness
-1
kernel
-1
mainstream
-1
marrow
-1
matter
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APASmart Define. (2016). border thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/border/thesaurus/antonyms
ChicagoSmart Define. 2016. "border thesaurus" https://smartdefine.org/border/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, border thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/border/thesaurus/antonyms>.
MLASmart Define. "border thesaurus" 30 March 2016. Web. 25 September 2026. <https://smartdefine.org/border/thesaurus/antonyms>