Cancellations rhymes with:
consolations, consolations, oscillations, accumulations, appellations, calculations, circulations, compilations, congratulations, consolations, constellation's, constellations, correlations, inoculations, installations, manipulations, miscalculations, mutilations, oscillations, ovulations, populations, regulations, revelations, speculations, stipulations, strangulations, tabulations, tribulations, violations
Cancellations sounds like:
concluding, consolations, consolidating, consolidations, consultancy, consultations, consulting