Overthrow rhymes with:
withrow, allegro, bobrow, borrow, budrow, damrow, deskpro, dubrow, duro, ebro, farrow, goodreau, goodroe, goodrow, guinarou, gyro, hydro, janeiro, jayroe, lagrow, metro, micro, micropro, moro, neuro, petrow, picaro, rio-de-janeiro, steinroe, sumrow, tedrow, tomorrow, whitrow, withrow, woodrow, yoshihiro, zorro
Overthrow sounds like:
operator, overdraw, overdrew, overthrew, overture