Provenience rhymes with:
ambiance, ambience, audience, dalliance, deviance, disobedience, expedience, experience, inexperience, insouciance, invariance, obedience, prescience, radiance, resilience, subservience, transience, variance
Provenience sounds like:
parfums, perfumes, perfuming, peruvians, pervomaiskaya, prepaying, prepping, previewing, probing, proofing, propionic, propping, provance, provenance, provence, provencio, provenza, province, province's, provinces, proving, purifying, purveying, purviance