haversack vs backpack

haversack and backpack both are nouns.

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

As nouns, haversack and backpack are synonyms defined as:

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

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

haversack (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

haversack (verb)	backpack (verb)
	hike with a backpack