Incontinence rhymes with:
countenance, maintenance, abstinence, countenance, maintenance, sustenance, abstinence, chrominance, countenance, dissonance, dominance, eminence, immanence, imminence, luminance, maintenance, ordinance, permanence, predominance, preeminence, prominence, provenance, resonance, sustenance
Incontinence sounds like:
imaginations, insinuating, insinuations