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.
precess process prices prezes precis precieuse presses precise pierces pareses paresis piracies precious peeresses parses prizes prises purses perses prases prosos proses parises peruses praises prisses prosses pursues pyrosis prissies prossies
recess precess coerces creeses merces pierces process terces tierces
prees prese price pricey purees sprees