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.
slaves sleaves slaveys solves salves selves slieves sleeves salvoes salvos sulfas silvas selvas sylvas salivas salvias sleighs sulphas salifies selfs sluffs sylphs sloughs selloffs
laves deleaves loaves claves slaves cleaves leaves sleaves lowlives halves releves glaives levees cloves olives elves calves believes solves valves relives wolves helves clavus loves pelves salves gloves slaveys levies pahlavis lives salvoes slieves relieves lavas sleeves lavs delves selves shelves
slave slavey salve salvia salvo selva silva silvae sleave solve sylva sylvae