Allums rhymes with:
alums, hallums, alums, collums, columns, cullum's, curriculums, dellums, emblems, hallums, harlem's, hellams, hellums, hoodlums, jaglom's, jerusalem's, kellams, ludlam's, ludlum's, moslems, muslims, neloms, problem's, problems, salem's, willaims, willems, woolums
Allums sounds like:
ailing, alamance, alamco, alamos, alamosa, alan's, alanco, alanis, alaniz, alianza, aliens, alimenies, alines, allamuchy, allaying, allen's, allens, alliance, alliance's, alliances, allianz, allianz's, alling, allowance, allowances, allowing, allying, almanac, almanza, almas, almasy, almos, alms, almys, along, alonge, alongi, alongs, alonso, alonza, alonzo, alumax, aluminize, aluminum's, alumnus, alums, ayling