"Volcanogenic" refers to something that is produced or caused by a volcano. Synonyms for "volcanogenic" include "volcanic" which describes something that is produced by or related to a volcano. Another synonym is "pyroclastic" which describes materials that result from volcanic activity, such as ash, pumice and volcanic bombs. "Magmatic" is another synonym, which refers to something that is related to magma, the molten rock beneath the Earth's surface that can erupt during a volcanic eruption. Lastly, "igneous" is another synonym, meaning something that is formed from or related to volcanic activity, such as igneous rocks. These words are all useful in describing the geological features and processes associated with volcanoes.