While and Whilst

While conjunction - At or during the time that.

Whilst is a synonym for while (British) in during topic. In some cases you can use "Whilst" instead a conjunction "While", when it comes to topics like though, when, as long as. popular alternative

While is a synonym for whilst in part of speech topic. You can use "While" instead a conjunction "Whilst", if it concerns topics such as duration, during, though, when.