25 entries under opening topic. ×

14
chasm(noun, deep, high, well)
12
gap(noun, break, split, division, deep)
7
hiatus(noun, deep, void, hole)
7
hollow(noun, area, dish, deep)
6
void(noun, deep, space, hole)
4
interval(noun, void, hollow, gap)
4
cavity(noun, deep, well, space)
4
hole(noun, dish, sink, well)
3
lacuna(noun, void, hollow)
1
empty space(expression, void, hollow)
1
interstice(noun, space, void, hollow)
1
preterition(noun, space, void, hollow)
1
tabula rasa(expression, void, hollow)
0
emptiness(void, hollow)
0
hollowness(void, hollow)
0
nihility(void, hollow)
0
nothingness(void, hollow)
0
nullity(void, hollow)
0
omission(void, hollow, gap, crater)
0
pretermission(noun, space, void, hollow)
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APASmart Define. (2015). gulf thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/gulf/thesaurus/synonyms
ChicagoSmart Define. 2015. "gulf thesaurus" https://smartdefine.org/gulf/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, gulf thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/gulf/thesaurus/synonyms>.
MLASmart Define. "gulf thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/gulf/thesaurus/synonyms>