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.
sheds shads shotes shutes shades sheets shadows shoddies chads shots shits shuts shoats shoots shotts shouts cheats chetahs shiatsu cheetahs shittahs
sheds eds pedes cedis meeds coeds geds leads hets heeds hods heads deads needs reeds teds redos weeds redds whids peds shads meads suedes meds seeds kneads beds aedes leuds feds feeds zeds edhs deeds beads cedes weds reds whets redes chads reads feods feuds
shed shad shade shadow shadowy shady sheet shied shod shoddy shoed ashed