underground, dankest, cavelike, dank, subbasement, lightless, cavernous, labyrinthine, eldritch, dantean, subaqueous, chthonic, mazelike, fetid, stygian, abyssal, twilit, claustrophobic, aboveground, interdimensional, sepulchral, foetid, unplumbed, subaquatic, labyrinthian, fathomless, dostoyevskian, phreatic, stalactite, rabbit warren, trackless, unnamable, oneiric, subglacial, infernal, unmapped, purgatorial, tentacled, gaslit, wormhole, liminal, opium den, sonic, primordial, clandestine, atmospheric, chemosynthetic, mossy, snailfish, charnel house, miry, fabled, cyclopean, backstairs, bottomless, cobwebby, oculus, grimy, castellated, plantlike, potholing, tomblike, mud dauber, erosional, upflow, phantasmal, hadean, airless, macrocosmic, illimitable, balconied, unhidden, snakelike, multistoried, seediest, carboniferous, miasmic, lovecraftian, veritable, ravening, arcaded, opiated, vertiginous, spiral staircase, shadowy, serpentine, anechoic, eerie, unnameable, explorable, overdecorated, sulphurous, subsurface, hydrothermal, micaceous, plutonic, domed, untrodden, phantasmagoric, depthless, furtive, unrepressed, divine, natural, shine, spiritual, though, above, ache, aches, adam, afflatus, alcoves, alleys, animate, antiphon, arcana, arctic, arid, armories, arrears, artifice, subterraneous, vaulted, roofless, ceilinged, haunted, roofed, sunless, tenebrous, darksome, enchanted, habitable, lit, storied, untenanted, commodious, fubterraneous

., amphicarpaea bracteata, amphicarpa bracteata, earth-ball, earthball, earthnut, false truffle, family rhizopogonaceae, genus rhizopogon, hard-skinned puffball, hog peanut, puffball, rhizopogon, rhizopogonaceae, sink, sinkhole, swallow hole, truffle, wild peanut

covert, subsurface, ulterior