What rhymes with dumber

2 Syllables
bumer, chumer, chummer, crumber, crummer, cumer, drumer, dumber, fromer, frommer, glummer, gumer, gummer, humer, hummer, mumer, plumer, plummer, rumer, scumer, scummer, shamer, slumer, slummer, somer, strumer, strummer, stumer, stummer, sumer, thumber
3 Syllables
becomer, succumber
4 Syllables
overcomer