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.
shiel shily shell sheal shill chiel sheol shelly sheila sial shul chill shale shyly shawl chela shall shoal shool chile chili shaul shaly chelae chilli chilly shaley shoaly challie shallow
chiel shiel shill shell helo sheol sheal chili hili heal heel heil hell chill hail phial hill riel diel wheal wheel while chela chile hila shily
she shea sheugh shew shoe sheesh sheuch