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.
neuroid nereid nerd nurd nerdy neared nard gnarred knarred
sciuroid neuroid chorioid toroid hydroid droid sciurid oroide murid juried viroid buried aroid choreoid lurid choroid rid rod urd