Transience rhymes with:
ambiance, ambience, audience, dalliance, deviance, disobedience, expedience, experience, inexperience, insouciance, invariance, obedience, prescience, provenience, radiance, resilience, subservience, variance
Transience sounds like:
tarnishing, transgenic, transimage, transoceanic, transoms, tranzonic, trouncing, truncheons