Confession rhymes with:
profession, accession, aggression, compression, concession, decompression, depression, deshane, deshon, digression, discretion, eschen, expression, freshen, hessian, impression, indiscretion, intercession, misimpression, nonaggression, obsession, oppression, possession, precession, procession, profession, progression, recession, regression, repossession, repression, retrocession, secession, session, succession, suppression, transgression
Confession sounds like:
campaign, campuzano, champagne, champaign, compagnie, compassion, compuchem, confucian, confusion