Answer:
Confession - formal admission of one's sins to a priest
Relic - a holy object related to a saint .
Indulgence - a document that pardons someone for committing a sin.
Pardoner - a church official who could preach and distribute indulgences.
Step-by-step explanation:
1. Confession is the formal admission of one's sin's to a priest. It is a religious practice more commonly in use during the earlier ages of the Christian believers, more specifically the Catholics as a way to get absolved of their sins.
2. Relic is a holy object related to a saint. It usually consists of any form of physical item or remains associated with someone who is revered.
3. Indulgence is a form of documentation which exonerates an individual from committing a sin. It allows the person to be pardoned of his sins, the temporal punishments being taken away from their due. This is also practiced among the medieval Catholic believers.
4. A pardoner is some clerk/ church official who is licensed to preach and distribute indulgences to the believers. He is also expected to raise money in the church for church purposes, help in the actively functioning of the church and it's progress.