Comp and Pay for

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

Pay for and comp are semantically related in pay back topic. In some cases you can use "Pay for" instead a verb "Comp".

Pay for verb - Have as a guest.

Comp and pay for are semantically related in fix topic. Sometimes you can use "Comp" instead a verb "Pay for", if it concerns topics such as return, pay back.