Toombs rhymes with:
costumes, maktoums, tombs, assumes, bloom's, blooms, boom's, booms, brooms, consumes, coombs, coomes, costumes, crooms, dooms, exhumes, flumes, fumes, groomes, grooms, humes, looms, maktoums, parfums, perfumes, plumes, presumes, resumes, room's, rooms, tombs, zooms
Toombs sounds like:
tambs, tampa's, tampax, tamposi, tamps, tempos, temps, tenpas, thumbs, thumps, timbs, timepiece, tombs, tunafish