| kabelkahandbagNoun | Noun |
| kabinkachanging roomNoun | Noun |
| kadeřnicehairdresserNoun | Noun |
| kadeřnictvíhair salonNoun | Noun |
| kadeřníkhairdresserNoun | Noun |
| kafecoffeeNoun | Noun |
| kachnaduckNoun | Noun |
| kakaococoaNoun | Noun |
| kalendářcalendarNoun | Noun |
| kalhotypantsNoun | Noun |
| kaloriecalorieNoun | Noun |
| kamarádmale friendNoun | Noun |
| kamarádkafemale friendNoun | Noun |
| kámenstoneNoun | Noun |
| kamiontruck; lorryNoun | Noun |
| KanadakanadaCanadaNoun | Noun |
| KanaďankanaďanCanadian manNoun | Noun |
| KanaďankakanaďankaCanadian womanNoun | Noun |
| kanárcanaryNoun | Noun |
| kancelářoffice; agencyNoun | Noun |
| kandidátcandidateNoun | Noun |
| kapelabandNoun | Noun |
| kapesníkhandkerchief; tissueNoun | Noun |
| kapitalismuscapitalismNoun | Noun |
| kapkadropNoun | Noun |
| kapkydrops; medicine dropsNoun | Noun |
| kaplechapelNoun | Noun |
| kaprcarpNoun | Noun |
| kapustasavoy cabbageNoun | Noun |
| karamelcaramelNoun | Noun |
| karavancaravan; camper vanNoun | Noun |
| kardiologcardiologistNoun | Noun |
| kartacardNoun | Noun |
| kartáčbrushNoun | Noun |
| kartáčektoothbrushNoun | Noun |
| kartycards; playing cardsNoun | Noun |
| kastrolsaucepan; potNoun | Noun |
| kašeporridge; mashNoun | Noun |
| kašelcoughNoun | Noun |
| kašnafountainNoun | Noun |
| katedrálacathedralNoun | Noun |
| katoličkaCatholic womanNoun | Noun |
| katolíkCatholic manNoun | Noun |
| kávacoffeeNoun | Noun |
| kavárnacafeNoun | Noun |
| kečupketchupNoun | Noun |
| kelímekcup; small containerNoun | Noun |
| kempcampsite; campNoun | Noun |
| keřbush; shrubNoun | Noun |
| kilokilogram; kiloNoun | Noun |
| kilogramkilogram; kiloNoun | Noun |
| kilometrkilometerNoun | Noun |
| kinocinema; movie theaterNoun | Noun |
| kláštermonasteryNoun | Noun |
| klávesnicekeyboardNoun | Noun |
| klavírpianoNoun | Noun |
| klavíristapianistNoun | Noun |
| klenotgem; jewelNoun | Noun |
| klenotnictvíjewelry storeNoun | Noun |
| klíčkeyNoun | Noun |
| klidpeace; quietNoun | Noun |
| klientclientNoun | Noun |
| kloboukhatNoun | Noun |
| klubclubNoun | Noun |
| klukboyNoun | Noun |
| knedlíkdumplingNoun | Noun |
| knihabookNoun | Noun |
| knihkupectvíbookstoreNoun | Noun |
| knihovnalibrary; bookcaseNoun | Noun |
| knírmustacheNoun | Noun |
| knížkalittle book; bookNoun | Noun |
| kobereccarpet; rugNoun | Noun |
| kočičkakitty; little catNoun | Noun |
| kočkacatNoun | Noun |
| kodiakKodiak bearNoun | Noun |
| kofolaKofola; Czech soft drinkNoun | Noun |
| kohoutrooster; cockNoun | Noun |
| kolacolaNoun | Noun |
| koláčcake; pastryNoun | Noun |
| koledacarolNoun | Noun |
| kolegacolleagueNoun | Noun |
| kolegyněfemale colleagueNoun | Noun |
| kolej (doprava)rail trackNoun | Noun |
| kolej (ubytování)dormitory; student residenceNoun | Noun |
| kolekrevenue stampNoun | Noun |
| kolektivteam; groupNoun | Noun |
| kolenokneeNoun | Noun |
| kolibříkhummingbirdNoun | Noun |
| kolobike; bicycle; wheelNoun | Noun |
| kolo (jízdní kolo)bicycle; bikeNoun | Noun |
| kolo (kolo u auta)wheelNoun | Noun |
| komediecomedyNoun | Noun |
| KomenskýkomenskýComeniusNoun | Noun |
| komisařcommissioner; officerNoun | Noun |
| komodachest of drawersNoun | Noun |
| komorachamber; storage roomNoun | Noun |
| komplikacecomplicationNoun | Noun |
| komunikacecommunicationNoun | Noun |
| komunismuscommunismNoun | Noun |
| komunistacommunistNoun | Noun |