Nouns

(n)confessionan admission of misdeeds or faults
(n)confessiona written document acknowledging an offense and signed by the guilty party
(n)confession(Roman Catholic Church) the act of a penitent disclosing his sinfulness before a priest in the sacrament of penance in the hope of absolution
(n)confessiona public declaration of your faith
(n)confessionthe document that spells out the belief system of a given church (especially the Reformation churches of the 16th century)