artifact vs flat solid

Other hyponyms of artifact include article, facility, Americana, anachronism, antiquity, block, button, commodity, good, trade good, cone, covering, creation, decker, decoration, ornament, ornamentation, electroplate, excavation, duplicate, extra, cloth, fabric, material, textile, facility, installation, fixture, float, insert, inset, instrumentality, instrumentation, means, bed, layer, lemon, stinker, line, marker, mystification, opening, cushioning, padding, plaything, toy, ready-made, restoration, sheet, sphere, square, squeaker, slip, strip, construction, structure, surface, thing, track, way, weight, building material, pavement, paving, paving material.