Prefatory and Supra

Prefatory adjective - Coming before the main part or item usually to introduce or prepare for what follows.

Supra and prefatory are semantically related In some cases you can use "Supra" instead an adjective "Prefatory".

Supra adverb - At an earlier place.

Prefatory and supra are semantically related in earlier topic. Sometimes you can use "Prefatory" instead an adjective "Supra".