Biscuit

(rare in the US) A small, flat, baked good which is either hard and crisp or else soft but firm: a cookie.

A small, usually soft and flaky bread, generally made with baking soda, which is similar in texture to a scone but which is usually not sweet.

A cracker.

"cheese and biscuits"

The "bread" formerly supplied to naval ships, which was made with very little water, kneaded into flat cakes and slowly baked, and which often became infested with weevils.