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.
porism prism purism presume prosoma parosmia
verism lyrism porism prism purism tourism charism chrism verismo heroism dorsum truism charisma chrisma chrisom
pariahs pours sporozoa aporias prize priss prise pries pricy pricey price praise porous paries porose pores pooris peris paris prissy puris spores uprise