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.
shul shaul sheol shiel shily shaly shool shoal shale shawl shill shall shell sheal shyly shelly sheila shaley shoaly shallow sial chill chola cholo chyle chela chiel chile chili