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.
diocese dices dioecies deices dieses decease doses duces daces dozes dioecious dowses deuces disses disuse dosses douses diesis daises disease dassies dizzies diseuse doozies daisies diecious disseize disseise dazes disseisee disseizee dosshouse taces tosses touses tassies tissues tizzies
diocese cease voces voices decease choices
dice deice dicey dioecy douce idiocy didoes diodes