Kro·to 
(krōtō′), Sir Harold Walter Born 1939.
(krōtō′), Sir Harold Walter Born 1939. British chemist who shared a 1996 Nobel Prize for discovering fullerenes.
- knockabout
- knock about
- knock around
- knock around (or about)
- knock back
- knock cold
- knock dead
- knock down
- knockdown
- knockdown-dragout
- knocker
- knock for a loop
- knock it off
- knock-knee
- knock-kneed
- knock off
- knockoff
- knock out
- knockout
- knock out of the box
- knock socks off
- knock (someone's) socks off
- knock someone's socks off
- knock some sense into
- knock/throw for a loop