A bread roll is a .. .

A bread roll is a piece of bread, usually small and round and is commonly considered a side dish. Bread rolls are often used in the same way as sandwiches are cut transversely, with fillings placed between the two halves.
French roll, often the term for the bread roll but also a sweeter softer roll with milk added to the dough.
Italian roll, also known as a hoagie roll, long roll or steak roll, a long, narrow roll with an airy, dry interior and crusty exterior.
Dinner roll, a smaller roll, often crusty.
Bun e.g., hamburger bun or hot dog bun. A bun is a small, usually sweet, bread. Commonly they are hand-sized or smaller, domed in shape, with a flat bottom.
Dollar roll, a small silver-dollar-sized roll, often sliced and used for sandwiches.
Finger roll, a soft roll about three times longer than it is wide.
A bagel is a bread product, traditionally shaped by hand into the form of a ring from wheat dough in which yeast has been added.
It is roughly hand-sized, which is first boiled for a short time in water and then baked.
A croissant is a buttery flaky bread roll named for its well known crescent shape.
Bread stick is a dry bread formed into sticks, served as an appetizer.
Baguette is thin elongated loaf, made of water, flour, yeast n salt.
http://en.wikipedia.org/wiki/List_of_breads