KO or k.o.

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

To knock out

A knockout

• school boards
• school book
• school books
• schoolboy
• schoolboyish
• schoolboys
• school-bred
• School Certificate
• schoolchild
• schoolchildren
• schoolcraft
• schoolcrafts
• school dame
• school dames
• schoolday
• schooldays
• school-divine
• school-divinity
• school doctor
• school doctors
• schoole
• schooled
• schooleries
• schoolery
• school experience