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.
leachate leached leched latched latchet leashed leeched letched licht
leachate chat cheat chute machete outcheat recheat chitchat
leach leachy lech laich latch leash leech letch loach bleach fleche clach pleach