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.
deashes dashes dashis dishes teaches toeshoes tushes toshes taches techies ditches douches duchies duchess tushies dachas datchas touches
bashes gnashes cashes pashes leashes washes hashes lashes sashes gashes ashes deashes fashes rashes mashes dashes quashes shes pishes pushes gouaches shies knishes cuishes loaches reshes maches tushes toeshoes taches whishes rushees coshes rushes dishes teaches toshes hushes roaches tushies peaches wishes shoes choushes caches leaches noshes kashas baches gushes joshes pashas reshoes bushes cashews moshes aches shews lushes mushes laches reaches sheas naches coaches meshes boshes dashis beaches poaches whooshes mashies wooshes fishes shushes