Knapsack vs Napsack - What's the difference?

As nouns the difference between knapsack and napsack

is that knapsack is a case of canvas or leather, for carrying items on the back while napsack is misspelling of knapsack.

is to go hiking while burdened with a knapsack, usually overnight (or longer..

(en noun)

(US) A case of canvas or leather, for carrying items on the back.

(cryptography) A set of values from which a subset is chosen.

* rucksack * backpack

(en verb)

To go hiking while burdened with a knapsack, usually overnight (or longer.)

My sleeping bag fell off my backpack into the water, while we were knapsacking up the mountain.