Defrance rhymes with:
circumference, teleconference, videoconference, abhorrence, adherence, appearance, assurance, circumference, clarence, clearance, coherence, cryptoclearance, 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, reassurance, recalcitrance, reinsurance, remembrance, st_lawrence, tarrance, teleconference, terence, terrance, terrence, torrance, torrence, videoconference
Defrance sounds like:
deference, deferring, defrancesco, defrancisco, defranco, defrank, devouring, diapering, difference, differences, differing, difrancesco, difranco, dobransky, dobrinja, dobrins, dobrinski