Reassurance rhymes with:
assurance, assurance, insurance, reinsurance, assurance, durrance, insurance, reinsurance, abhorrence, adherence, appearance, assurance, circumference, clarence, clearance, coherence, cryptoclearance, defrance, disappearance, dorrance, durrance, durrence, entrance, ference, florance, florence, forbearance, forebearance, fragrance, hindrance, incoherence, insurance, interference, larrance, laurance, laurence, lawrance, lawrence, lieurance, lorance, lorence, lowrance, noninterference, perseverance, preponderance, reappearance, recalcitrance, reinsurance, remembrance, st_lawrence, tarrance, teleconference, terence, terrance, terrence, torrance, torrence, videoconference
Reassurance sounds like:
reassurances, reassuring, recurrence, recurring, rejiggering, requiring, rogernomics, rosecrans, rosekrans