1417 words end in “K”
4 letters
backbankbookbuckbulkcookcorkdarkdeckdeskdiskdockduckfolkforkfunkgeekhackhawkhookjackjunkkickkirklacklinklocklookluckmarkmaskmilknecknickpackparkpeakpickpinkporkpunkrackrankrickriskrockseeksicksilksinktalktanktasktooktrekwalkweakweekworkamokarakbalkbarkbaskbeakbeckbilkbirkbiskbockbonkboskbunkbuskcalkcarkcaskcockconkcuskdankdawkdhakdickdinkdirkdorkdrekdunkduskfeckfinkflakfuckgawkgeckginkgookgowkguckgunkhaikhankharkheckhickhockholkhonkhowkhuckhulkhunkhuskjaukjerkjinkjockjoukkeckkeekkinkkonkkookkyaklanklarkleakleeklicklunklurkmackmeekmerkmickminkmirkmockmonkmoskmuckmurkmusknarkneuknocknookoinkpaikpeckpeekperkpockpuckreckreekrinkrookruckrusksacksanksarksoaksocksooksoukspiksucksulksunktackteakticktuckturktuskwackwarkwaukwickwinkwonkyackyankyelkyerkyeukyockyolkyuckzerkzonk
5 letters
blackblankblinkblockbreakbrickbrookcheckchickchuckclerkclickclockcrackcreekdrinkdrunkfrankgreekknockquicksharkshockspankspeakstackstickstockstuckthankthickthinktracktricktrucktrunkabackacockalackamuckapeakapeekbatikbaulkbleakbrankbrinkbriskbrockbruskcaulkchalkcharkcheekchinkchirkchockchookchunkclackclankcleekclinkcloakclonkcluckclunkcrankcreakcrickcroakcrockcrookcruckdrankdreckdroukflackflankflaskfleckflickflockflunkfreakfriskfrockgleekhacekhoickkaiakkamikkapokkayakkioskknackkopekkulakkyackmujikplackplankplinkplonkpluckplunkprankprickprinkpulikquackquarkquirkreinksameksculkshackshanksheikshirkshookshtikshuckskinkskulkskunkslackslanksleekslickslinkslunksmacksmeeksmerksmirksmocksnacksnarksneaksnecksnicksnooksnucksparkspeckspickspookspunkstalkstankstarksteaksteekstinkstirkstookstorkstunkswankswinktaluktarokthackthunktilaktorsktraiktranktroaktrocktupiktweakumiakwhackwhelkwhiskwrackwreakwreckwrickyapok
6 letters
attackremarkstruckunlockanorakantickarrackbattikbedeckbemockbetookbeylikbipackbohunkbytalkbyworkcarackchabukcopeckcrojikdamaskdebarkdebeakdebunkdemarkdetickdibbukdikdikdybbukembankembarkemboskgalyakhijackimbarkimparkkalpakkopeckmamlukmedickmoujikmuklukmuktukmuzhikmuzjiknudnikoomiakoutaskpadaukpadoukrebeckrebookrecockrecookrecorkredockrelinkrelockrelookrepackreparkreperkrerackreseekresoakretackretookreworkrheboksanjakschrikschtikscreakshlockshmuckshnookshrankshriekshrinkshrunkshticksquawksqueakstreakstreekstrickstrooksusliktambakthwacktombaktsktsktugrikumiackuncockuncorkundockunhookunhuskunkinkunlinkunmaskunpackunpickunsunkuntackuntuck