A backpack is exactly the same thing. A book bag is not just for books you know.
The German word for book bag is "Buechertasche".
there are several different terms : bag, clutch, handbag, change purse, pocket book, etc...
Sack.
Another word for 'Male purse' is Man bag
A sack.
a backpack
A sack or a tote bag.
book-bag, or book bag. it is two words, but it can be one if you use a little slash-y thing.
a doche bag
2 syllables book-bag
bundle, parcel, bag, envelope
Another word for a book maker is a "bookie" or a "betting agent."