linchpin, fulcrum, cornerstone, keystone, integral, cog, mainstay, centerpiece, underpinning, bulwark, focal point, backbone, stalwart, catalyst, component, kingpin, sine qua non, trump card, enabler, masterstroke, talisman, achilles heel, pillar, powerhouse, touchstone, changer, part, contributor, key, boon, backer, hallmark, saving grace, staple, paramount, hub, stumbling block, bedrock, prerequisite, element, shambles, facet, lifeblood, bridgehead, anathema, mastermind, crown jewel, prime mover, jigsaw, bolsters, savior, beneficiary, hinge, antithesis, colossus, flashpoint, spearhead, embodiment, crux, determinant, death knell, triumvirate, definer, centrality, watchword, precursor, bastion, forerunner, factor, mainspring, vanguard, sparkplug, holy grail, dynamo, microcosm, epitome, tatters, juggernaut, central, handmaiden, litmus test, counterweight, impediment, plank, flux, role, orchestrator, trumps, motivator, panacea, dynamic, ally, lifeline, scuppers, launching pad, solidity, workhorse, trendsetter, buzzword, proponent, determiner, tenet, cornerstones, dilemma, problematics, subtext, aporia, assumptions, crossroad, desideratum, divide, impetus, insights, nexus

pin, support

anchor, backbone, linchpin, mainstay