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.
prairie parrier prier prior parure priory parer purer parura poorer pourer pareira
prairie airer airier fairer varier hairier hoarier learier mirier tearier warier wearier wirier charier