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.
parura parure pareira parer parrier prier prior purer poorer pourer priory prairie
crura parura ruer aurar aurora cruor parure truer
par pariah sparry para parae pare pareo pareu pair parry parr pear prau pauper spar spare sparrow sprue