knapsack /napˈsak/

1. A bag made of strong material, with straps for carrying on the back, eg when hiking
2. A rucksack

• springboard
• springboards
• springbok
• springboks
• spring box
• spring boxes
• springbuck
• springbucks
• spring-carriage
• spring-carriages
• spring-cart
• spring-carts
• spring chicken
• spring chickens
• spring-clean
• spring-cleaned
• spring-cleaner
• spring-cleaners
• spring-cleaning
• spring-cleans
• spring clip
• spring clips
• springe
• springed
• springer