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.
hyena hyaena yen yean yin yon yawn yoni yuan
hyena yen hymenia mynah yean hyaena taenia xenia sienna senna scena penna faena tenia hymen veena genua genoa henna venae vena duenna myna