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.
dulcet dullest dolcetto dualist duelist dualized duellist delist talced dialist tallest teleost deloused diallist dialysed dialyzed
dulcet coolest chillest talced scilicet realest placet palest nailset molest illest lest halest vilest fullest foulest fellest blest dullest tallest shoalest
dolce dolci doulas dualize duals duellos duels dulias dulls dulse