Opus rhymes with:
copus, mopus, all-purpose, bippus, bumpus, campus, chapas, chiapas, compas, compass, coppess, copus, corpus, encompass, eohippus, gyrocompass, hippocampus, hospice, kappus, lapis, lupus, malpass, manglapus, molpus, molpus', mopus, multipurpose, negropalpus, oedipus, olympus, pappas, pompous, porpoise, prapas, precipice, purpose, tapas
Opus sounds like:
obese, obeys, obsequious, obsess, obsesses, obuchowski, obvious, ofc, off's, office, office's, offices, officio, offs, ohbayashi, oops, op's, opaque, opax, opec, opec's, opic, opic's, oppose, opposes, ops, ovex