Hydro rhymes with:
budrow, goodreau, goodroe, goodrow, tedrow, woodrow, allegro, bobrow, borrow, budrow, damrow, deskpro, dubrow, duro, ebro, farrow, goodreau, goodroe, goodrow, guinarou, gyro, janeiro, jayroe, lagrow, metro, micro, micropro, moro, neuro, overthrow, petrow, picaro, rio-de-janeiro, steinroe, sumrow, tedrow, tomorrow, whitrow, withrow, woodrow, yoshihiro, zorro
Hydro sounds like:
hader, hadria, haider, hater, hatter, hattery, hattori, haueter, hauter, hayter, header, headwater, heater, heather, heathrow, heeter, heider, heidiwear, hider, hither, hitter, hodder, hoddur, hooter, hotter, hotwire, huether, hutter, hyder, hydra