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.
scena scene senna sen sienna sewn snaw sene seen scion xenia sauna seine sunna sunnah son sun syn sin zein cine cion sain sane sine sinh sone snow soon sown sunn sign syne sawn zona
scena hymenia hyaena taenia duenna xenia sienna senna scene penna genua faena genoa henna venae vena veena tenia hyena