picnic- picnicking
Some six letter words ending in K are:attackdamaskembarkhijackremarkshriekshrink
Some five letter words ending in k include:slackstackstinkstunktrucktrunk
It's the rule for root words ending in "c." If the "k" was not there it would look like the word was supposed to be pronounced as if it ended in "sing." The words trafficking, and mosaicking are treated similarly.
Kinetic and kleptomaniac begin with the letter k. They end with the letter c.
keenkinkingpin
Four-letter words ending with K:amokbackbalkbankbarkbaskbeakbeckbilkbockbookbuckbulkbunkcaskcockconkcookcorkdankdarkdeckdeskdirkdiskdockduckdunkduskfinkflakfolkforkfunkgawkgeekgunkhackhankharkhawkhickhockhonkhookhulkhunkhuskjackjerkjockjunkkickkinkkirklacklanklarkleakleeklicklinklocklooklucklurkmackmarkmaskmeekmickmilkminkmockmonkmuckmurkmusknecknicknookoinkpackparkpeakpeckpeekperkpickpinkpockporkpuckpunkrackrankreekrickrinkriskrockrookruckrusksacksankseeksicksilksinksoaksocksucksulksunktacktalktanktaskteakticktnpktooktrektucktuskwalkweakweekwickwinkworkyankyolk
c k naidu
barrackberserkcassockcowlickcarsickearmarkgoshawkhammockhassockhemlockoutlookpadlockransackrecheckrestockseasick
wk and ok.
Brook
There are actually numerous words that make the hard "c" sound and begin with a "k".A couple examples would be the words kite and kabob.When the vowels A, O, or U come after the letter "C", it will produce the "K" sound making it a hard "C".Some examples of words beginning with K and hard C:KaleidoscopeKickKilometricalKilometric