volcanic crater

English Thesaurus

1. a bowl-shaped geological formation at the top of a volcano (noun.object)

hypernym	:	formation, geological formation,
definition	:	(geology) the geological features of the earth (noun.object)

hyponym	:	caldera,
definition	:	a large crater caused by the violent explosion of a volcano that collapses into a depression (noun.object)

hyponym	:	maar,
definition	:	a flat-bottomed volcanic crater that was formed by an explosion; often filled with water (noun.object)

part meronym	:	volcano,
definition	:	a mountain formed by volcanic material (noun.object)