linchpin Definition

lynchpin, backbone, mainstay, anchor, cornerstone, keystone, fulcrum, crucial, part, hub, key, pillar, crux, hinge, mainspring, pivot, piece, core, centrepiece, axis, taproot, focus, heart, pivoting, bolt, countershaft, cement, basis, ankle, spindle, axle, shaft, centreline, centerline, cog, focal point, touchstone, bulwark, lifeblood, centerpiece, trump card, powerhouse, enabler, spearhead, stalwart, masterstroke, mastermind, bastion, kingpin, counterweight, bridgehead, lifeline, integral, instigator, stronghold, bellwether, boon, catalyst, component, underpinning, bedrock, crown jewel, stumbling block, microcosm, flashpoint, backer, savior, facet, hallmark, contributor, staple, element, achilles heel, saving grace, embodiment, impediment, prime mover, workhorse, changer, cripple, hinges, vanguard, sine qua non, litmus test, epitome, anathema, sparkplug, precursor, powerbroker, launching pad, battleground, prerequisite, godsend, deathblow, factor, paramount, antithesis, ally, bolsters, moneymaker,