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.
hyaena hyena yen yawn yean yuan yin yon
faena hyaena ana henna manna canna gaen goanna kana liana paeon haen genua ruana scena sienna duenna tenia mana venae mania lanai vena hymenia fauna aeon anoa anna guanay genoa choana veena paean penna sauna senna xenia taenia hyena