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.
chopin chopine cheapen shapen shippen shippon
chopin pin pain pion piny pine pina pian papain pein pippin rapini reopen repine spin apian spiny copen lipin lupin lupine open opine pepino rapine rappini repin cioppino spine supine tiepin lapin teopan chopine
choppy chop chap chape chapeau chappie chip chippie chippy chuppa chuppah shop shoppe