Mammoth Uncensored Word List:
67 words ending with k, 11 letters long

apparatchik biofeedback boeremusiek breechblock cabinetwork candlestick cheesesteak chequerwork computernik countermark countersank countersink countersunk counterwork countryfolk crackerjack cramboclink dessertfork diamondback doublecheck doublespeak doublethink electroweak fiddlestick fingerstick formulamilk googlewhack groundbreak halterbreak journeywork killikinick kinnikinick komondorock lacquerwork latticework leatherback leatherneck leatherwork mellowspeak monkeytrick needlestick netherstock nonloopback outpolitick passagework plasterwork prisonbreak quarterback quarterdeck realpolitik rudderstock scratchback shuttlecock singlestick sparrowhawk spatterwork stagestruck steeplejack stickleback stringybark swivelblock technospeak tiddleywink trelliswork trestlework weathercock yellowshank