64 entries under noun topic. ×

6
opening(end, closing)
5
start
4
beginning
4
introduction
3
gap(break, breach, accord, parity)
3
commencement
2
activation
1
action(stop, end, cease, inaction)
1
hole(opening, mountain)
1
inception
1
rip(cut, tear)
1
rupture(break, agreement, split)
1
socket
1
split(agreement, opening)
1
vent(solid, outlet)
0
chasm(gap, abyss)
0
authority
0
basis
0
bedrock
0
building
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APASmart Define. (2015). closure thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/closure/thesaurus/antonyms
ChicagoSmart Define. 2015. "closure thesaurus" https://smartdefine.org/closure/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, closure thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/closure/thesaurus/antonyms>.
MLASmart Define. "closure thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/closure/thesaurus/antonyms>