KO or k.o.

1. Kick-off
2. Knockout
3. Knock out

To knock out

A knockout

• rock
• rockabillies
• rockabilly
• rock-alum
• rock and roll
• rock and roller
• rockaway
• rockaways
• rock-badger
• rock-badgers
• rock-basin
• rock-basins
• rock bass
• rock basses
• rock-bird
• rock-birds
• rock boots
• rock borer
• rock borers
• rock bottom
• rock-bottom
• rock-bound
• rock brake
• rock brakes
• rock breaker