Proclivity rhymes with:
activity, captivity, conductivity, creativity, exclusivity, festivity, insensitivity, nativity, negativity, productivity, progressivity, radioactivity, reactivity, relativity, selectivity, superconductivity
activity, captivity, conductivity, creativity, exclusivity, festivity, insensitivity, nativity, negativity, productivity, progressivity, radioactivity, reactivity, relativity, selectivity, superconductivity