Geyser :: Geyser (n.) A boiling spring which throws forth at frequent intervals jets of water, mud, etc., driven up by the expansive power of steam..
Geyserite :: Geyserite (n.) A loose hydrated form of silica, a variety of opal, deposited in concretionary cauliflowerlike masses, around some hot springs and geysers..
Keyseat :: Keyseat (v. t.) To form a key seat, as by cutting. See Key seat, under Key..