Onward rhymes with:
downward, inward, kenward, sunward, winward, winword, 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, outward, poleward, rickward, rightward, seaward, shoreward, skyward, southward, straightforward, sunward, upward, wayward, westward, windward, winward, winword