A degree is an academic qualification that is awarded by a college or university. It typically takes four years to complete a bachelor's degree, and two years to complete a master's degree. A doctorate degree typically takes four to seven years to complete.
A bachelorette is a woman who has never been married. The term is often used to refer to a young woman who is in her late twenties or early thirties and is still single.
So, the main difference between a degree and a bachelorette is that a degree is an academic qualification, while a bachelorette is a marital status.