abyss, archipelago, avalanche, canal, cartography, chasm, climatic, contiguous, countryside, crater, crevasse, desert, enclave, epicenter, equatorial, equinox, fluvial, frontier, geothermal, gorge, gradient, gulf, hemisphere, hinterland, inlet, lagoon, land, latitude, levee, longitude, marine, maritime, mesosphere, oasis, oceanic, peak, populace, precipice, purlieu, ravine, seismic, stalactite, stalagmite, stratosphere, stream, subsidence, subterranean, summit, tectonic, terrestrial, topography, troposphere, uncharted, vicinity, vista, waterway