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