packsack vs backpack

packsack and backpack both are nouns.

Word	Noun	Adjective	Verb	Adverb
packsack	Yes	No	No	No
backpack	Yes	No	Yes	No

As nouns, packsack and backpack are synonyms defined as:

packsack and backpack: a bag carried by a strap on your back or shoulder

Other synonyms of packsack include back pack, haversack, knapsack, rucksack.

packsack (noun)	backpack (noun)
a bag carried by a strap on your back or shoulder	a bag carried by a strap on your back or shoulder

packsack (verb)	backpack (verb)
	hike with a backpack