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.
slut slutty salute solute slit slot silt slat salt sellout silty slued sault slaty sleet slate salty solate slatey slitty sleety sallet saltie slid celt sild sled sold sloyd zlote slide sloid solid soldi salad soled soldo zloty