I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
doula dulia dol dole dual duly dull tola duel doll diol delay dolly dully dooly doily doyly duelli doolie dually doyley dahlia doolee del dal deil tool dale toll dill dell toil diel deal dele tala tela dahl tole deli tolu dial tule
doula voila chola dulia soul pula olea moolah mola koala cola coala joule joual hula bola viola boule ghoul foul folia bulla boyla kola moola mulla olla sola holla tola cholla