Allegro rhymes with:
lagrow, bobrow, borrow, budrow, damrow, deskpro, dubrow, duro, ebro, farrow, goodreau, goodroe, goodrow, guinarou, gyro, hydro, janeiro, jayroe, lagrow, metro, micro, micropro, moro, neuro, overthrow, petrow, picaro, rio-de-janeiro, steinroe, sumrow, tedrow, tomorrow, whitrow, withrow, woodrow, yoshihiro, zorro
Allegro sounds like:
alcazar, alcocer, alegre, alegria, aleshire, algar, alger, algeria, alguire, alkire, allegory, allegra, allgaier, allgeier, allgeyer