KO or k.o.

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

To knock out

A knockout

• quarter-boys
• quarter-bred
• quarter day
• quarter days
• quarterdeck
• quarterdecker
• quarterdeckers
• quarterdecks
• quartered
• quarter-evil
• quarter-final
• quarter-finals
• quarter-galleries
• quarter-gallery
• quarter-guard
• quarter-guards
• quarter-gunner
• quarter-gunners
• quarter-horse
• quarter-horses
• quarter hour
• quarter-hourly
• quarter hours
• quarter-ill
• quartering