Vernonia rhymes with:
adonia, amazonia, ansonia, antonia, caledonia, colonia, cydonia, diaphonia, donia, estonia, gastonia, gonia, harmonia, idonia, latonia, macedonia, madonia, new-caledonia, omonia, patagonia, petronia, philharmonia, rondonia, sidonia, sinfonia, slavonia, slovonia, sophronia, tonia, vidonia
Vernonia sounds like:
varani, varano, varian, varin, varina, varma, varn, varney, varni, varnon, varnum, varon, varona, varone, varrone, vereen, verena, verene, verina, verine, verma, vermin, vern, verna, verne, verney, verno, vernon, veron, verona, vipperman, viren, virina, virna, viromune, vrain, vrana, vremya, vroman, vroom, vrooman