canalis vertebralis, coccyx, spinal canal, tail bone, vertebra, vertebral canal

linchpin, lifeblood, cornerstone, mainstay, bedrock, lynchpin, keystone, pillar, sinews, nucleus, workhorses, fulcrum, powerhouse, lifeline, bulwark, hub, conduit, cog, superhighway, underpinning, network, integral, strength, resiliency, support, infrastructure, cripple, staple, focal point, flourishing, glue, stalwart, vanguard, centerpiece, gateway, resilience, underpinnings, foundation, stranglehold, catalyst, connections, connectivity, chocolate eclair, core, reliant, heartland, touchstone, triumvirate, boon, fiber, bastion, part, bridgehead, counterweight, embodiment, saving grace, rallying cry, sclerotic, component, guts, microcosm, forerunner, prosper, death knell, forte, bulk, galvanizing, naas, wellspring, solidity, trailblazers, link, triad, lodestone, enabler, roots, asynchronous transfer mode, taproot, holy trinity, stretches, hallmark, mesh, pioneers, solid, connective, fortitude, atrophies, premier, optical fibre, fountainhead, sustenance, blueprint, brawn, deathblow, anathema, leadership, optical fiber, impetus, vitality, continuity, complement, epitome, backbones, groundwork, mainspring, prop, raison, base, coherence, cohesiveness, common, foundations, nexus, substructure, commonality

chine, notochord

., chine, incorruptible, invertebrate, loin, lumbus, saddle, saddle of lamb, splitter, vertebrate

axial skeleton

computer network, fortitude, skeletal structure, support

anchor, back, grit, gumption, guts, linchpin, lynchpin, mainstay, sand, spinal column, spine, vertebral column