Profession's rhymes with:
professions, professions, professions, confessions, professions, aggressions, concessions, confessions, depressions, digressions, discretions, expressions, freshens, impressions, indiscretions, obsessions, oppressions, possessions, processions, professions, recession's, recessions, regressions, repossessions, repressions, session's, sessions, sessions', transgressions
Profession's sounds like:
professing, professions, proficiency, proposing, provisioning, provisions, provoking