Comp and Trial and error

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

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

Trial and error noun - Experimenting until a solution is found.

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