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.
treasure treasury tressure tressour tressier terser tracer dresser tarsier tracery trouser trusser dressier dorser
rasure erasure treasure reassure preassure pressure treasury tressure
tres trays strass tears tires toras tores trass tares tress trees tressy trews treys tries trues tyres stress