Bittersweet rhymes with:
nutrasweet, sunsweet, treesweet, buckwheat, nutrasweet, sunsweet, treesweet, athlete, balliett, bradstreet, broadstreet, browbeat, buckwheat, crabmeat, deadbeat, drumbeat, greenstreet, heartbeat, hemstreet, longstreet, mainstreet, margarete, mesquite, mincemeat, navarrete, negrete, norfleet, nutrasweet, obsolete, overeat, overheat, overstreet, parakeet, spreadsheet, stonestreet, sunsweet, treesweet, umfleet, upbeat, vandervliet, vanvleet, wallstreet, wellfleet, worksheet
Bittersweet sounds like:
bathurst, bitterest, boatright, boatwright, buttressed