Du rhymes with:
adieu, ado, badu, chengdu, deux, dew, do, doo, douwe, due, katmandu, ledoux, long-overdue, outdo, overdo, overdue, pas-de-deux, perdue, purdue, redo, seydoux, subdue, undo, undue, urdu, yabbadabbadoo
Du sounds like:
d, d'etat, d'etude, da, dad, dada, daddy, daddy-o, dade, dado, dady, dae, daewoo, dah, dai, daido, daiei, daiwa, dao, daoud, dat, data, date, dated, dato, dau, daw, dawdy, dawe, dawit, day, daya, daye, ddt, de, dea, dead, deadhead, deadwood, deady, death, dede, dedo, dee, deed, deeded, deedee, deedy, deet, deity, deo, detty, dew, dewey, dewit, dewitt, dewitte, dewoody, dewy, dey, deyo, deyoe, dhia, di, dia, did, diddy, didi, dido, die, died, diede, diet, diodati, diodato, diode, dith, ditto, ditty, diwa, do, dodd, dodi, dodo, doe, doh, doha, doi, doo, doodad, doody, dot, dote, doth, doto, dott, dotted, dottie, dotty, doty, doud, douthat, douthett, douthit, douthitt, doutt, douty, douwe, dow, dowd, dowda, dowdy, dowe, dowie, dowty, dud, duda, dudd, duddy, dude, due, dueitt, duet, duey, duh, duhe, dui, duo, duthie, dutoit, dutt, duty, duwe, dwi, dyad, dye, dyed