bookbag

As nouns the difference between rucksack and bookbag

is that rucksack is rucksack, backpack while bookbag is a bag for holding books for school.

As nouns the difference between bookbag and mochila

is that bookbag is a bag for holding books for school while mochila is (us|western us) a large leather flap that covers the saddle tree.

As nouns the difference between purse and bookbag

is that purse is a small bag for carrying money while bookbag is a bag for holding books for school.

As a verb purse

is to press (one's lips) in and together so that they protrude.

As a noun bookbag is

a bag for holding books for school.

Bookbag is a synonym of satchel.

As nouns the difference between satchel and bookbag

is that satchel is a bag or case with one or two shoulder straps, especially used to carry books etc while bookbag is a bag for holding books for school.

As nouns the difference between school and bookbag

is that school is a group of fish or a group of marine mammals such as porpoises, dolphins, or whales or school can be (us|canada)  an institution dedicated to teaching and learning; an educational institution while bookbag is a bag for holding books for school.

As a verb school

is (of fish) to form into, or travel in a school or school can be to educate, teach, or train (often, but not necessarily, in a school).

As nouns the difference between bag and bookbag

is that bag is a flexible container made of cloth, paper, plastic, etc while bookbag is a bag for holding books for school.

As a verb bag

is to put into a bag.