Noun

• S: (n) pumice, pumice stone (a light glass formed on the surface of some lavas; used as an abrasive)
• direct hypernym / inherited hypernym / sister term
• S: (n) rock, stone (material consisting of the aggregate of minerals like those making up the Earth's crust) "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"
• S: (n) quartzite (hard metamorphic rock consisting essentially of interlocking quartz crystals)
• S: (n) road metal (broken rock used for repairing or making roads)
• S: (n) sedimentary rock (rock formed from consolidated clay sediments)
• S: (n) sial (the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum)
• S: (n) sima (rock that form the continuous lower layer of the earth's crust; rich in silicon and magnesium)
• S: (n) metamorphic rock (rock altered by pressure and heat)
• S: (n) gravel, crushed rock (rock fragments and pebbles)
• S: (n) caliche (nitrate-bearing rock or gravel of the sodium nitrate deposits of Chile and Peru)
• S: (n) shingling ((geology) sediment in which flat pebbles are uniformly tilted in the same direction)
• S: (n) pumice, pumice stone (a light glass formed on the surface of some lavas; used as an abrasive)
• S: (n) aphanite (fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye)
• S: (n) claystone (fine-grained rock consisting of compacted clay particles)
• S: (n) dolomite (a kind of sedimentary rock resembling marble or limestone but rich in magnesium carbonate)
• S: (n) emery stone, emery rock (a mixture of emery dust and a binder; can be molded into grindstones)
• S: (n) pudding stone, conglomerate (a composite rock made up of particles of varying size)
• S: (n) fieldstone (stone that occurs naturally in fields; often used as building material)
• S: (n) greisen (a granitic rock composed of quartz and mica)
• S: (n) tufa, calc-tufa (a soft porous rock consisting of calcium carbonate deposited from springs rich in lime)
• S: (n) magma (molten rock in the earth's crust)
• S: (n) igneous rock (rock formed by the solidification of molten magma)
• S: (n) limestone (a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals)
• S: (n) marble (a hard crystalline metamorphic rock that takes a high polish; used for sculpture and as building material)
• S: (n) matrix ((geology) a mass of fine-grained rock in which fossils, crystals, or gems are embedded)
• derivationally related form

Verb

• S: (v) pumice (rub with pumice, in order to clean or to smoothen)