It Rhymes With and Means the Same as Knapsack
Puzzle 12 of Pop Bands Pack
Question is: It Rhymes With and Means the Same as Knapsack
and the answer is: BACKPACK
Word Meaning:
BACKPACK — A knapsack, sometimes mounted on a light frame, but always supported by straps, worn on a person’s back for the purpose of carrying things, especially when hiking, or on a student's back when carrying books.
Definitions from Wiktionary.