c-cor ccccc cnnnn co-co cocc- cocco cocon cocur cokk- conck conco concr connu cono- conon conor corno cornu coro- coron corun couco couru crock croco cronk crook croon crouk croun cruck crunk cruor cucuk cukor cunco cuoco curno curro knock knokk knork knorr knuck knurr ko-ko kocon kokko kokor kokou kokur konno konnu konro konur koonu koorn kooru korck korku korno koron koror korro koruk korun kouno krnuo krock kronk kroon kroun krunk kruun kucuk kukko kukok kukur kunku kunur kurku kuruc kuruk nnooo no-no nokko nokon non-u nonno noonu norco noroc norok noron norro norun nu-nu nucor nunon nunun nuoro nuruk nurun occur ockro ocorn okkur okoc okoro okuku okuru onco- onoon onorn onour ooooo orcon ornon oroco orono oruku oruro ouoro ourno r-co- ro-ro rocco rockn rocko rocor rocou rokkk rokon ronco ronk- ronko ronno ronok rouko runcu runo- runon u-con uconn uncok uncon uncor unkur unnun unnur unoor unorn unrun unurn urkun urnok urour urucu uuork uuuuu