| koncertconcertNoun | Noun |
| konecendNoun | Noun |
| konferenceconferenceNoun | Noun |
| koníčekhobbyNoun | Noun |
| kontaktcontactNoun | Noun |
| kontinentcontinentNoun | Noun |
| kontrolacheck; inspectionNoun | Noun |
| konvenceconventionNoun | Noun |
| konverzaceconversationNoun | Noun |
| konvicekettle; jugNoun | Noun |
| konzultaceconsultationNoun | Noun |
| kopechillNoun | Noun |
| kopírkaphotocopierNoun | Noun |
| korunacrown; Czech crownNoun | Noun |
| kořeníspice; seasoningNoun | Noun |
| kosmetičkabeauticianNoun | Noun |
| kosmetikacosmetics; beauty careNoun | Noun |
| kostboneNoun | Noun |
| kostelchurchNoun | Noun |
| kostniceossuary; bone chapelNoun | Noun |
| kostýmcostume; suitNoun | Noun |
| košíkbasketNoun | Noun |
| košileshirtNoun | Noun |
| kotěkittenNoun | Noun |
| kotelboiler; kettleNoun | Noun |
| kotníkankleNoun | Noun |
| koupelnabathroomNoun | Noun |
| kouřenísmokingNoun | Noun |
| kousekpiece; bitNoun | Noun |
| kousíčektiny bit; little pieceNoun | Noun |
| koutcorner; nookNoun | Noun |
| kovmetalNoun | Noun |
| kovárnaforge; smithyNoun | Noun |
| kozagoatNoun | Noun |
| krabiceboxNoun | Noun |
| krabičkasmall boxNoun | Noun |
| krádežtheftNoun | Noun |
| krajregionNoun | Noun |
| kraj (místo)edge; side; regionNoun | Noun |
| kraj (správní jednotka)administrative regionNoun | Noun |
| krajinalandscape; countrysideNoun | Noun |
| králkingNoun | Noun |
| králíčekbunny; little rabbitNoun | Noun |
| králíkrabbitNoun | Noun |
| královstvíkingdomNoun | Noun |
| kraťasyshortsNoun | Noun |
| krávacowNoun | Noun |
| kravatatie; necktieNoun | Noun |
| kravičkalittle cowNoun | Noun |
| krbfireplaceNoun | Noun |
| krejčítailorNoun | Noun |
| krejčovstvítailoring; tailor shopNoun | Noun |
| krémcreamNoun | Noun |
| KrétakrétaCreteNoun | Noun |
| krevbloodNoun | Noun |
| krizecrisisNoun | Noun |
| krkneckNoun | Noun |
| Krkonošekrkonošethe Giant MountainsNoun | Noun |
| krojcostumeNoun | Noun |
| krokstepNoun | Noun |
| krokodýlcrocodileNoun | Noun |
| kruhcircleNoun | Noun |
| křečekhamsterNoun | Noun |
| křesloarmchair; chairNoun | Noun |
| křesťanChristianNoun | Noun |
| křesťankafemale ChristianNoun | Noun |
| křišťálcrystalNoun | Noun |
| křižovatkacrossroads; intersectionNoun | Noun |
| křížovkacrossword puzzleNoun | Noun |
| kufrsuitcaseNoun | Noun |
| kuchařcookNoun | Noun |
| kuchařkafemale cook; cookbookNoun | Noun |
| kuchařka (kniha)cookbookNoun | Noun |
| kuchyňkitchenNoun | Noun |
| kulečníkbilliardsNoun | Noun |
| kulturacultureNoun | Noun |
| kůňhorseNoun | Noun |
| kupétrain compartmentNoun | Noun |
| kuriozitaoddity; curiosityNoun | Noun |
| kurtcourtNoun | Noun |
| kurz (kurz peněz)exchange rateNoun | Noun |
| kurz (vyučovací kurz)course; classNoun | Noun |
| kuřechickenNoun | Noun |
| kuspieceNoun | Noun |
| kutilhandyman; DIY personNoun | Noun |
| kůže (kůže na těle)skinNoun | Noun |
| kůže (materiál)leatherNoun | Noun |
| kvalitaqualityNoun | Noun |
| květenMayNoun | Noun |
| květinaflower; plantNoun | Noun |
| květinářstvíflower shop; florist’sNoun | Noun |
| kytaraguitarNoun | Noun |
| kytkaflower; plantNoun | Noun |
| laboratořlaboratoryNoun | Noun |
| láhevbottleNoun | Noun |
| lampalampNoun | Noun |
| lanovkacable carNoun | Noun |
| láskaloveNoun | Noun |
| látkafabric; materialNoun | Noun |
| ledenJanuaryNoun | Noun |