Robustas rhymes with:
augustus, gustus, justice, justus, armistice, asbestos, augustus, erastus, eustace, eustis, faustus, festus, gustus, hostess, justice, justus, priestess, rastus, sextus
Robustas sounds like:
rapist's, rapists, rebstock, reifsteck, revisits, rhapsodic, rhapsodize, rhapsodizes, ripostes