Comp and Preliminary

Comp noun - Something given to someone without expectation of a return.

Preliminary and comp are semantically related in examination topic. In some cases you can use "Preliminary" instead a noun "Comp".

Preliminary noun - A performance, activity, or event that precedes and sets the stage for the main event.

Comp and preliminary are semantically related in check topic. Sometimes you can use "Comp" instead a noun "Preliminary", if it concerns topics such as standard.