| jenonlyZarf | Zarf |
| jenomonlyZarf | Zarf |
| jeslenursery, crecheİsim | İsim |
| jestliif, whetherBağlaç | Bağlaç |
| ještěeven, still, again, yet, moreZarf | Zarf |
| jetgo by vehicle; rideFiil | Fiil |
| jevištěstageİsim | İsim |
| jezditgo by vehicle regularly; rideFiil | Fiil |
| jezerolakeİsim | İsim |
| JežíšekježíšekBaby Jesus, Czech Christmas gift bringerİsim | İsim |
| jídelnacafeteria, dining roomİsim | İsim |
| jídelnídining; menuSıfat | Sıfat |
| jídlofood, mealİsim | İsim |
| jihsouthİsim | İsim |
| jinakotherwise; differentlyZarf | Zarf |
| jinamsomewhere elseZarf | Zarf |
| jindeelsewhereZarf | Zarf |
| jinýother; differentSıfat | Sıfat |
| jísteatFiil | Fiil |
| jistěcertainlyZarf | Zarf |
| jistýsure; certainSıfat | Sıfat |
| jítgo; walkFiil | Fiil |
| jízdenkaticketİsim | İsim |
| jízdnítravel; ridingSıfat | Sıfat |
| jižnísouthernSıfat | Sıfat |
| jménonameİsim | İsim |
| jmenovat sebe called; be namedFiil | Fiil |
| joyeahPartikül | Partikül |
| jógayogaİsim | İsim |
| jogurtyogurtİsim | İsim |
| JUDr.judr.Doctor of Law titleİsim | İsim |
| JugosláviejugoslávieYugoslaviaİsim | İsim |
| kto, towardEdat | Edat |
| kabátcoatİsim | İsim |
| kabelcableİsim | İsim |
| kabelkahandbagİsim | İsim |
| kabinkachanging roomİsim | İsim |
| kadeřnicehairdresserİsim | İsim |
| kadeřnictvíhair salonİsim | İsim |
| kadeřníkhairdresserİsim | İsim |
| kafecoffeeİsim | İsim |
| kachnaduckİsim | İsim |
| kakaococoaİsim | İsim |
| kalendářcalendarİsim | İsim |
| kalhotypantsİsim | İsim |
| kaloriecalorieİsim | İsim |
| kamwhereZarf | Zarf |
| kamarádmale friendİsim | İsim |
| kamarádkafemale friendİsim | İsim |
| kámenstoneİsim | İsim |
| kamiontruck; lorryİsim | İsim |
| KanadakanadaCanadaİsim | İsim |
| KanaďankanaďanCanadian manİsim | İsim |
| KanaďankakanaďankaCanadian womanİsim | İsim |
| kanárcanaryİsim | İsim |
| kanárskýcanarySıfat | Sıfat |
| kancelářoffice; agencyİsim | İsim |
| kandidátcandidateİsim | İsim |
| kapelabandİsim | İsim |
| kapesníkhandkerchief; tissueİsim | İsim |
| kapitalismuscapitalismİsim | İsim |
| kapkadropİsim | İsim |
| kapkydrops; medicine dropsİsim | İsim |
| kaplechapelİsim | İsim |
| kaprcarpİsim | İsim |
| kapustasavoy cabbageİsim | İsim |
| karamelcaramelİsim | İsim |
| karavancaravan; camper vanİsim | İsim |
| kardiologcardiologistİsim | İsim |
| kartacardİsim | İsim |
| kartáčbrushİsim | İsim |
| kartáčektoothbrushİsim | İsim |
| kartycards; playing cardsİsim | İsim |
| kastrolsaucepan; potİsim | İsim |
| kašeporridge; mashİsim | İsim |
| kašelcoughİsim | İsim |
| kašlatcoughFiil | Fiil |
| kašnafountainİsim | İsim |
| katedrálacathedralİsim | İsim |
| katolickýCatholicSıfat | Sıfat |
| katoličkaCatholic womanİsim | İsim |
| katolíkCatholic manİsim | İsim |
| kávacoffeeİsim | İsim |
| kavárnacafeİsim | İsim |
| každodennídaily; everydaySıfat | Sıfat |
| každopádněanywayZarf | Zarf |
| každýeach, everyZamir | Zamir |
| kdewhereZarf | Zarf |
| kdowhoZamir | Zamir |
| kdokolianyoneZamir | Zamir |
| kdywhenZarf | Zarf |
| kdybyifBağlaç | Bağlaç |
| kdysionce (in the past)Zarf | Zarf |
| kdyžwhenBağlaç | Bağlaç |
| kečupketchupİsim | İsim |
| kelímekcup; small containerİsim | İsim |
| kempcampsite; campİsim | İsim |
| keřbush; shrubİsim | İsim |
| kilokilogram; kiloİsim | İsim |
| kilogramkilogram; kiloİsim | İsim |