Bulbous rhymes with:
albus, airbus, albus, barnabas, bierbusse, cannabis, columbus, columbus', debose, faubus, globus, harquebus, ibis, jacobus, kobus, nimbus, omnibus, paribas, phebus, phoebus, pluribus, rebus, sorbus, syllabus, turbas, vobis
Bulbous sounds like:
baalbek, baalbeq, bailiffs, balbach, beilfuss, beliefs, believes, bellhops, bilbao's, billips, billups, bivalves, blips, blobs, blowfish, blowpipes, blubaugh, bluffs, bolivia's, bouillabaise, bulbs