Gabbro :: Gabbro (n.) A name originally given by the Italians to a kind of serpentine, later to the rock called euphotide, and now generally used for a coarsely crystalline, igneous rock consisting of lamellar pyroxene (diallage) and labradorite, with sometimes chrysolite (olivine gabbro)..
Gabel :: Gabel (n.) A rent, service, tribute, custom, tax, impost, or duty; an excise..
Gabeler :: Gabeler (n.) A collector of gabels or taxes.
Gabelle :: Gabelle (n.) A tax, especially on salt..