Defying rhymes with:
indemnifying, indemnifying, applying, belying, buying, complying, crying, decrying, denying, drying, dyeing, dying, eyeing, flying, frying, implying, indemnifying, lying, misapplying, overflying, overlying, plying, prying, relying, replying, retrying, semidrying, shying, sighing, spying, supplying, tieing, trying, tying, underlying, undying, vying
Defying sounds like:
dabbing, daphne's, daphnis, dauphinais, davanzo, davinci, deafening, deafness, debonis, debunk, debunks, deepening, deepens, defence, defense, defense's, defenses, defiance, defines, defining, devens, deviance, deviancy, devinci, devinci's, devins, diaphanous, difonzo, dipping, divens, diving, divining, dobbins, dobyns, doffing, dubbing, dubinsky