Sustained rhymes with:
abstained, stained, unstained, abstained, ascertained, attained, contained, detained, entertained, maintained, obtained, pertained, retained, self-contained, stained, unstained
Sustained sounds like:
saddened, sectioned, sediment, sixteenth, stained, stamand, stamant, stamaty, stand, standa, standout, stant, stanwood, statement, stationed, steamed, stemmed, stennett, stent, stinnett, stinnette, stint, stomata, stoned, student, stunned, stunt, stunted, stymied, sweetened, systemat, systemwide