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.
genoa genua gen gene genu gien genie genii gin hygiene jean jeon
genoa henna hyaena taenia xenia senna penna nona meno hymenia leno quinoa keno genua venae anoa vena veena faena enow beano hyponoia scena sienna duenna tenia hyena