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.
precise precis precieuse precious prises paresis parises pareses presses prisses praises precess piracies prissies peeresses prezes perses prases prizes prices parses proses purses peruses pierces process prosses pursues pyrosis prossies prosos
precise graecize grecize lyricise precis cercis