Plaisance rhymes with:
absence, acquiescence, adolescence, beneficence, coalescence, convalescence, essence, evanescence, innocence, licence, license, luminescence, nuisance, obsolescence, phosphorescence, quintessence, reconnaissance, reminiscence, reticence, senescence
Plaisance sounds like:
pelagians, pelekunu's, pelican's, pelicans, pillaging, placencia, placing, plagens, plaguing, plascencia, plasencia, pleasing, plucinski, plucking, plugging, policeman's, policing, polishing, polyconomics, polygamous, polygynous, publicizing, publishing, publishing's, publishings, pulsing