Nimbus rhymes with:
columbus, columbus', airbus, albus, barnabas, bierbusse, bulbous, cannabis, columbus, columbus', debose, faubus, globus, harquebus, ibis, jacobus, kobus, omnibus, paribas, phebus, phoebus, pluribus, rebus, sorbus, syllabus, turbas, vobis
Nimbus sounds like:
nabisco, nabisco's, nabobs, nafco, namibia's, napco, naps, navajo, navajos, navas, navickas, navies, navis, navy's, neaves, nephew's, nephews, neves, nevis, nevius, nibs, nieves, nips, nipsco, nobec, nobec's, nobis, nobuaki, nobuyuki, noffke, nova's, novacek, novack, novak, novak's, novakowski, novas, novice, novices, novick, novicki, novo's, nymphs