Conundrum rhymes with:
gundrum, gundrum, landrum, lucodendrum, abudrahm, doldrum, gundrum, landrum, lucodendrum, meldrum, waldrum, woodrome, woodrum
Conundrum sounds like:
centram, centromin, centurion, chemetron, cintron, condren, condron, contran, contrarian, cosmodrome, counterman, countryman, countrymen