The List
There are 248 5 letter words with K as the last letter. The highest scoring is QUICK at 20 points in Scrabble. 5 carry three or more vowels, which makes them useful for dumping a vowel-clogged rack.
ABACKABASKACOCKALACKALECKAMUCKAPEAKAPEEKAWORKBANAKBATIKBAULKBLACKBLANKBLEAKBLINKBLOCKBLOOKBLUNKBOBAKBOINKBORAKBRACKBRANKBREAKBRICKBRINKBRISKBROCKBROOKBRUSKCAULKCHACKCHALKCHANKCHARKCHAWKCHECKCHEEKCHICKCHIRKCHOCKCHOOKCHOWKCHUCKCHUNKCLACKCLANKCLECKCLEEKCLEIKCLERKCLICKCLINKCLOAKCLOCKCLONKCLUCKCLUNKCRACKCRANKCREAKCREEKCRICKCROAKCROCKCRONKCROOKCRUCKCRUNKDRACKDRANKDRECKDRINKDROOKDROUKDRUNKEBOOKERICKFLACKFLANKFLASKFLECKFLICKFLISKFLOCKFLUNKFRACKFRANKFREAKFRISKFROCKGLAIKGLEEKGLISKGOPAKGOPIKGREEKHACEKHAICKHOICKIBRIKKAIAKKAMIKKAPOKKAYAKKIOSKKLICKKNACKKNOCKKOPEKKRUNKKULAKKYACKMALIKMELIKMUJIKNEBEKPLACKPLANKPLINKPLONKPLOOKPLOUKPLUCKPLUNKPRANKPRINKPRONKPULIKQUACKQUARKQUICKQUIRKQUONKREINKROJAKSAICKSAMEKSCULKSHACKSHANKSHARKSHEIKSHIRKSHMEKSHOCKSHOOKSHTIKSHUCKSKINKSKRIKSKULKSKUNKSLACKSLANKSLEEKSLICKSLINKSLUNKSMAAKSMACKSMAIKSMEEKSMEIKSMERKSMIRKSMOCKSNACKSNARKSNEAKSNECKSNICKSNOEKSNOOKSNOWKSNUCKSPANKSPARKSPEAKSPECKSPELKSPICKSPINKSPOOKSPORKSTACKSTALKSTANKSTARKSTEAKSTEEKSTICKSTINKSTIRKSTOCKSTONKSTOOKSTORKSTRAKSTUCKSTUNKSUKUKSWACKSWANKSWINKTALAKTALUKTAROKTEREKTHACKTHANKTHEEKTHICKTHILKTHINKTHUNKTILAKTOPEKTORSKTRACKTRAIKTRANKTRECKTRICKTROAKTROCKTRONKTRUCKTRUNKTUPEKTUPIKTWANKTWEAKTWERKUMIAKUPTAKWAULKWHACKWHELKWHILKWHISKWRACKWREAKWRECKWRICKYAPOKYOICK