KO or k.o.

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

To knock out

A knockout

• undergrowth
• undergrowths
• underhand
• underhanded
• underhandedly
• underhandedness
• underhandednesses
• underhands
• under-hangman
• under-hangmen
• under hatches
• underhonest
• underhung
• underinsure
• underinsured
• underinsures
• underinsuring
• underinvestment
• under-jaw
• underjawed
• under-jaws
• underkeep
• underkeeper
• underkeepers
• underkeeping