Duller rhymes with:
color, culler, discolor, mccullar, mcculler, metrocolor, muller, multicolor, noncolor, stuller, tullar, tuller
Duller sounds like:
dahler, dallaire, dallara, deadlier, deadwyler, dealer, dehler, delair, delara, delaura, delaware, deller, delleri, delora, delore, delorey, deloria, delray, delre, delrio, detailer, detweiler, detwiler, dilaura, dilauro, diller, dilorio, dollar, dowler, dweller