Mammoth Uncensored Word List:
20 - 11 letter words starting with kn

knackwursts knavishness kneecapping kneejerking knickknacks knickpoints knifepoints knightheads knighthoods knightliest knobkerries knockabouts knockwursts knotgrasses knowingness knowledging knuckleball knucklebone knucklehead knucklelike