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.
tartan tartana torten triton tortoni tritone teardown trodden turdine
quartan partan tartan chorten tartana pertain retain certain protean parton ratan ratany rattan reattain burton hearten carton cortin curtain lurdan marten jordan martin torten puritan shorten
tarty tart start stared dart tardo tardy tared tarot tarred tarried teared tort torta torte tret trite trot starred tattered