Synonyms|372Antonyms|27|Broader|18Narrower|8Related|123
4
interior
3
inland(adjective, interior)
2
inner
2
inside
2
inward
1
internal
1
latitude
1
area
1
intrinsic
1
center
1
central
1
extend
1
hub
1
median
1
midpoint
1
minimum
1
native
1
settled region(expression, idiom)
1
verge
0
home
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APASmart Define. (2015). frontier thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/frontier/thesaurus/antonyms
ChicagoSmart Define. 2015. "frontier thesaurus" https://smartdefine.org/frontier/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, frontier thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/frontier/thesaurus/antonyms>.
MLASmart Define. "frontier thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/frontier/thesaurus/antonyms>