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.
slaveys slaves sleaves solves salves selves salvoes sleeves slieves selvas silvas sulfas salvos sylvas salivas salvias sleighs sulphas salifies selfs sluffs sylphs sloughs
slaveys laves leaves loaves valves halves calves claves cleaves glaives salves slaves sleaves deleaves
slave slavey salve sleave solve