Profession rhymes with:
confession, accession, aggression, compression, concession, confession, decompression, depression, deshane, deshon, digression, discretion, eschen, expression, freshen, hessian, impression, indiscretion, intercession, misimpression, nonaggression, obsession, oppression, possession, precession, procession, progression, recession, regression, repossession, repression, retrocession, secession, session, succession, suppression, transgression