Assimilated rhymes with:
accumulated, annihilated, capitulated, congratulated, emulated, encapsulated, escalated, extrapolated, inoculated, interpolated, manipulated, miscalculated, nonregulated, overregulated, recalculated, reformulated, simulated, stipulated, tabulated, tesselated, titillated, unregulated, ventilated
Assimilated sounds like:
accumulate, accumulated, assimilate