Luminescence rhymes with:
evanescence, senescence, evanescence, senescence, acquiescence, adolescence, coalescence, convalescence, essence, evanescence, obsolescence, phosphorescence, quintessence, senescence
Luminescence sounds like:
lancing, langhans, languishing, lankans, lansing, lansing's, launching, launchings, lawmaking, leingang, lensing, limousines, linking, longing, longings, lounging, luncheons, lunching, lunging, lynching, lynchings