1. knucks a small metal weapon
  2. noxious injurious to physical or mental health
  3. duck soup any undertaking that is easy to do
  4. innocuous not injurious to physical or mental health
  5. lockstep a manner of marching in file in which each person's leg moves with and behind the corresponding leg of the person ahead
  6. knock out eliminate
  7. knockout a blow that renders the opponent unconscious
  8. cockspur widely grown stout Old World hay and pasture grass
  9. kneecap a small flat triangular bone in front of the knee that protects the knee joint
  10. cozy up ingratiate oneself to; often with insincere behavior
  11. knockwurst short, garlicky German sausage
  12. gas up fill with gasoline
  13. box up enclose or confine as if in a box
  14. knockabout full of rough and exuberant animal spirits
  15. backstop a structure to prevent a ball from traveling out of a field
  16. Knox Scottish theologian who founded Presbyterianism in Scotland and wrote a history of the Reformation in Scotland (1514-1572)
  17. quickstep military march accompanying quick time
  18. knock off get rid of (someone who may be a threat) by killing
  19. backslap display excessive cordiality (towards)
  20. knockdown a blow that knocks the opponent off his feet