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.
es ess ease easy essay
bees voes les looies queues pies pees res gaes kaes jees wries roues sees hues cooees hies zees haes wyes dies gees dues hes ties hoes maes wytes wees lues shes knees shoes oes vies bes dees hypes lies louies lees rees pes roes goes kues joes cees rues sues es cues vees fes moues wyches noes shies wyles woes waes fees ghees toes foes tees gies does yes