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10 entries under opening topic. ×

11
black smoker(noun, expression, crack, water)
11
deep-sea vent(noun, expression, crack, water)
11
deep ocean hot vent(noun, expression, crack, water)
11
fissure on the floor of a sea(noun, expression, crack, water)
11
hot vent(noun, expression, crack, water)
11
hot water vent(noun, expression, crack, water)
11
sea vent(noun, expression, crack, water)
11
white smoker(noun, expression, crack, water)
5
hydrothermal vent(noun, expression, crack, water)
3
deep sea vent(noun, expression, crack, water)
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APASmart Define. (1970). fissure in a planet's surface thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/fissure_in_a_planet%27s_surface/thesaurus/synonyms
ChicagoSmart Define. 1970. "fissure in a planet's surface thesaurus" https://smartdefine.org/fissure_in_a_planet%27s_surface/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 1970, fissure in a planet's surface thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/fissure_in_a_planet%27s_surface/thesaurus/synonyms>.
MLASmart Define. "fissure in a planet's surface thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/fissure_in_a_planet%27s_surface/thesaurus/synonyms>