Syphilis rhymes with:
alexopoulos, angeles, annapolis, antonopoulos, christopoulos, chrysalis, decarolis, demopoulos, eliopoulos, fotopoulos, georgopoulos, indianapolis, kinepolis, manolis, margulis, marsalis, matulis, micropolis, minneapolis, neopolis, panagopoulos, petropoulos, port-angeles, stathopoulos, stavropoulos
Syphilis sounds like:
sables, sabol's, savalas, scofflaws, scuffles, shapeless, shovels, showplace, shuffles, siebels, sivils, sobil's, sobils, soboleski, sobolewski, sobolik, spellacy, spells, spill's, spillage, spills, splash, splashes, splashy, splice, splices, spoilage, spoils, squabbles, subhlok, sublease, suffolk, supplies, supply's, swivels