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.
sleet sleety sallet sled slit slut slat salt slot silt slued soled salty slaty slide slate sault silty slatey souled seeled soiled sealed salute solute slitty soloed saltie slutty solate siloed sailed sallied sellout sullied celt sild slid sold
fleet leet sleet gleet let sallet gullet bleat billet ballet howlet cleat bolete violet fillet filet culet relet millet mullet palet pellet pleat sleety toilet willet quillet gallet blet owlet mallet galleta valet gleed boleti bullet killdee gleety cullet bleed bluet muleta glede pallet piolet pullet rillet collet callet delete wallet chalet
sale seel seely slew sloe slue sole solei isle