Columbus rhymes with:
columbus', columbus', columbus', columbus', columbus', nimbus, airbus, albus, barnabas, bierbusse, bulbous, cannabis, columbus', debose, faubus, globus, harquebus, ibis, jacobus, kobus, nimbus, omnibus, paribas, phebus, phoebus, pluribus, rebus, sorbus, syllabus, turbas, vobis
Columbus sounds like:
clamps, cleanups, climbs, clumps, colombia's, colombo's, columbia's, columbus', columbus's