Upbeat rhymes with:
browbeat, deadbeat, drumbeat, heartbeat, athlete, balliett, bittersweet, 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, vandervliet, vanvleet, wallstreet, wellfleet, worksheet
Upbeat sounds like:
update, updated, upped, uppity, upwood