55 entries under noun topic. ×

27
bottom(adjective, interjection, foundation, fundamental)
10
lowest(adjective, poor, inferior, rear)
10
foot(base, rear)
6
nadir
5
base(foundation, rear)
5
support
2
basis
2
footing
2
hearth
2
worst
1
bed
1
foundation
1
ground
1
pedestal
1
substructure
1
underside(side, bottom)
0
backing
0
backside
0
basement
0
bedding
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APASmart Define. (2016). top thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/top/thesaurus/antonyms
ChicagoSmart Define. 2016. "top thesaurus" https://smartdefine.org/top/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, top thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/top/thesaurus/antonyms>.
MLASmart Define. "top thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/top/thesaurus/antonyms>