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.
peroxy proxy prexy prex perks progs pyrex pargos percuss perukes pyrexia periques pirogues piroques
peroxy proxy hydroxy roux braxy prexy xerox
perique perk perky peruke pirog pirogue piroque prog apercu