Mammoth Uncensored Word List:
60 words ending with ks, 12 letters long

apparatchiks bashibazouks biofeedbacks boeremusieks breechblocks cabinetworks candlesticks chequerworks computerniks countermarks countersinks counterworks crackerjacks cramboclinks dessertforks diamondbacks doublechecks doublespeaks doublethinks fiddlesticks fingersticks googlewhacks halterbreaks journeyworks killikinicks kinnikinicks lacquerworks latticeworks leatherbacks leathernecks leatherworks mellowspeaks monkeytricks netherstocks outpoliticks passageworks plasterworks prisonbreaks quarterbacks quarterdecks realpolitiks rudderstocks scratchbacks shuttlecocks singlesticks sparrowhawks spatterdocks spatterworks spondoolicks steeplejacks sticklebacks stretchmarks stringybarks swivelblocks technospeaks tiddleywinks trellisworks trestleworks weathercocks yellowshanks