Volcanicity :: Volcanicity (n.) Quality or state of being volcanic; volcanic power.
Volcanism :: Volcanism (n.) Volcanic power or action; volcanicity.
Volcanist :: Volcanist (n.) One versed in the history and phenomena of volcanoes.
Volcanist :: Volcanist (n.) One who believes in the igneous, as opposed to the aqueous, origin of the rocks of the earth's crust; a vulcanist. Cf. Neptunist..
Volcanity :: Volcanity (n.) The quality or state of being volcanic, or volcanic origin; volcanicity..
Volcanization :: Volcanization (n.) The act of volcanizing, or the state of being volcanized; the process of undergoing volcanic heat, and being affected by it..
Volcanize :: Volcanize (v. t.) To subject to, or cause to undergo, volcanic heat, and to be affected by its action..
Volcano :: Volcano (n.) A mountain or hill, usually more or less conical in form, from which lava, cinders, steam, sulphur gases, and the like, are ejected; -- often popularly called a burning mountain..