Upward rhymes with:
afterward, awkward, aylward, backward, buzzword, carryforward, cloward, derward, dorward, downward, durward, eastward, eduard, edward, forward, gatward, goward, hallward, harward, hayward, heyward, homeward, inward, kenward, landward, leeward, leftward, millward, milward, northeastward, northward, norward, onward, outward, poleward, rickward, rightward, seaward, shoreward, skyward, southward, straightforward, sunward, wayward, westward, windward, winward, winword
Upward sounds like:
ueberroth, upbraid, upbraided, uproot, uprooted