knapsack /napˈsak/

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

• catered
• caterer
• caterers
• cateress
• cateresses
• catering
• caterings
• caterpillar
• caterpillars
• caters
• caterwaul
• caterwauled
• caterwauling
• caterwaulings
• caterwauls
• cates
• cat-eyed
• cat-fight
• cat-fights
• catfish
• catfishes
• catflap
• catgut
• catguts
• cath.