quicksand, morass, abyss, quagmire, mire, oblivion, cesspool, mud puddle, pitfall, purgatory, junk heap, riptide, rathole, maw, cliff, mess, swamp, chasms, abysses, precipice, despond, vortex, brinks, netherworld, minefield, muskeg, mudhole, brontosaurus, trash heap, glop, irrelevancy, turd, neverland, maelstrom, netherland, murk, garbage heap, mousehole, rut, rubbish heap, ledge, miasmic, quandary, ant hill, brier patch, conundrum, muck, dinosaur, stasis, inertia, hydras, whomp, tangle, pickle, thicket, gyres, jillions, whiskered, wormholes, banana peel, pond scum, spiny anteater, stalactite, perdition, paradox, piranha, guppy, cobweb, hot potato, warier, misgovernment, moray eel, weasel, arundo donax, predicaments, ravine, blowhole, tyrannosaurus, snowbank, boulder, snake, ursus arctos, gerund, mud, refugium, slimey, theropod dinosaur, woodpile, shoals, streambed, floes, nothingness, chimaera, hairy, eyeless, silversides, phantasm, idiocracy, blubbery, guck, coprolite, aquatic mammal

cavity, pit