| nevzpomenout sifail to rememberVerb | Verb |
| nevzpomínat sinot rememberVerb | Verb |
| nezajímatnot interestVerb | Verb |
| nezaměstnanostunemploymentNoun | Noun |
| nezaměstnanýunemployed personNoun | Noun |
| nezapomenoutnot forgetVerb | Verb |
| nezapomenutelnýunforgettableAdjective | Adjective |
| nezařízenýunfurnishedAdjective | Adjective |
| neziskovýnon-profitAdjective | Adjective |
| neznámýunknownAdjective | Adjective |
| nežthanConjunction | Conjunction |
| nicnothingPronoun | Pronoun |
| nikamnowhereAdverb | Adverb |
| nikdenowhereAdverb | Adverb |
| nikdono onePronoun | Pronoun |
| nikdyneverAdverb | Adverb |
| nízkolow, at a low heightAdverb | Adverb |
| nízkýlowAdjective | Adjective |
| nowellParticle | Particle |
| nocnightNoun | Noun |
| nočnínight; night-timeAdjective | Adjective |
| nohafootNoun | Noun |
| nominovatnominateVerb | Verb |
| NornorNorwegian manNoun | Noun |
| NorkanorkaNorwegian womanNoun | Noun |
| normálněnormallyAdverb | Adverb |
| normálnínormalAdjective | Adjective |
| NorskonorskoNorwayNoun | Noun |
| norskyin NorwegianAdverb | Adverb |
| norštinaNorwegian (language)Noun | Noun |
| nosnoseNoun | Noun |
| nositwearVerb | Verb |
| nosorožecrhinoNoun | Noun |
| nostrifikacerecognition of a foreign diplomaNoun | Noun |
| notamusical noteNoun | Noun |
| notebooklaptopNoun | Noun |
| nouzeneed; hardshipNoun | Noun |
| nověnewly, recentlyAdverb | Adverb |
| novinářjournalistNoun | Noun |
| novinářkafemale journalistNoun | Noun |
| novinkapiece of newsNoun | Noun |
| novinynewspaperNoun | Noun |
| novýnewAdjective | Adjective |
| nudaboredomNoun | Noun |
| nuditboreVerb | Verb |
| nudnýboringAdjective | Adjective |
| nulazeroNumber | Number |
| nutněnecessarilyAdverb | Adverb |
| nutnýnecessaryAdjective | Adjective |
| nůžknifeNoun | Noun |
| oabout, at, forPreposition | Preposition |
| obabothNumber | Number |
| obalitcoat, wrapVerb | Verb |
| obarvitdye, colourVerb | Verb |
| občancitizenNoun | Noun |
| občankafemale citizenNoun | Noun |
| občanstvícitizenshipNoun | Noun |
| občassometimesAdverb | Adverb |
| občasnýoccasionalAdjective | Adjective |
| občerstvenírefreshmentsNoun | Noun |
| obecmunicipality; villageNoun | Noun |
| obecnímunicipal; village/townAdjective | Adjective |
| obědlunchNoun | Noun |
| obědvathave lunchVerb | Verb |
| obezitaobesityNoun | Noun |
| obézníobeseAdjective | Adjective |
| obchodshopNoun | Noun |
| obchodnicefemale trader; saleswomanNoun | Noun |
| obchodníktraderNoun | Noun |
| objednanýbooked; having an appointmentAdjective | Adjective |
| objednatorderVerb | Verb |
| objednat semake an appointmentVerb | Verb |
| objednat siorder for oneselfVerb | Verb |
| objednávatorderVerb | Verb |
| objednávkaorderNoun | Noun |
| objektobjectNoun | Noun |
| objemvolumeNoun | Noun |
| objetgo around, bypassVerb | Verb |
| objevitdiscoverVerb | Verb |
| objezddetourNoun | Noun |
| objíždětgo around, drive aroundVerb | Verb |
| objížďkadetourNoun | Noun |
| oblačnocloudyAdverb | Adverb |
| oblastareaNoun | Noun |
| oblečeníclothingNoun | Noun |
| obleksuitNoun | Noun |
| oblékánídress-upNoun | Noun |
| oblékat seget dressedVerb | Verb |
| obléknout seget dressedVerb | Verb |
| oblíbenýfavorite; popularAdjective | Adjective |
| obličejfaceNoun | Noun |
| obloženýgarnished; toppedAdjective | Adjective |
| oborfieldNoun | Noun |
| obrazpicture; paintingNoun | Noun |
| obrázekpictureNoun | Noun |
| obrovskýhugeAdjective | Adjective |
| obsaditoccupy; take a placeVerb | Verb |
| obsahovatcontain; includeVerb | Verb |
| obsluhaservice staffNoun | Noun |
| obuvfootwearNoun | Noun |