physical object vs geological formation

Other hyponyms of physical object include unit, whole, location, charm, good luck charm, curio, curiosity, oddity, oddment, peculiarity, rarity, draw, lot, film, hoodoo, je ne sais quoi, keepsake, relic, souvenir, token, filler, makeweight, part, portion, prop, property, snake, stuff, small beer, trifle, trivia, triviality, paring, catch, commemorative, discard, finding, floater, fomite, vehicle, formation, growth, hail, head, ice, dry land, earth, ground, land, solid ground, terra firma, ground, land, soil, moon, neighbor, neighbour, remains, ribbon, thread, shiner, vagabond, wall, web, clanker.