Some words that end with the letter K are:
Some six letter words ending in K are:attackdamaskembarkhijackremarkshriekshrink
Some five letter words ending in k include:slackstackstinkstunktrucktrunk
barrackberserkcassockcowlickcarsickearmarkgoshawkhammockhassockhemlockoutlookpadlockransackrecheckrestockseasick
Four-letter words ending with K:amokbackbalkbankbarkbaskbeakbeckbilkbockbookbuckbulkbunkcaskcockconkcookcorkdankdarkdeckdeskdirkdiskdockduckdunkduskfinkflakfolkforkfunkgawkgeekgunkhackhankharkhawkhickhockhonkhookhulkhunkhuskjackjerkjockjunkkickkinkkirklacklanklarkleakleeklicklinklocklooklucklurkmackmarkmaskmeekmickmilkminkmockmonkmuckmurkmusknecknicknookoinkpackparkpeakpeckpeekperkpickpinkpockporkpuckpunkrackrankreekrickrinkriskrockrookruckrusksacksankseeksicksilksinksoaksocksucksulksunktacktalktanktaskteakticktnpktooktrektucktuskwalkweakweekwickwinkworkyankyolk
8 letter words ending with K: * backpack * homework * playback * sidewalk
Five letter words that end in K are:blackblockbreakbrookchalkcheckchinkchuckchunkclickclockcluckclunkcrankcreekcroakcrookdrankdrinkdrunkflackflankflaskfleckflickflockflunkfrankfreakfriskfrockGreekkayakkioskknackknockquackquarkquickquirkshackshanksharksheikshirkshockshookshuckskulkskunkslacksleekslickslunksmacksmirksmocksnacksneakspanksparkspeakspeckspookspunkstackstalkstunkstarksteakstickstinkstockstorkstuckswank
wk and ok.
Brook
Keep and kelp are four letter words starting with K and ending with P.
Nick Nook Neck
killer, kilter, kisser
There are no 13 letter words that start with J and end with K.