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.
cyprian sprain soprani soprano sporran spurn sapphirine
cyprian parian prawn prion purin pyran apiarian heparin caprine papyrian riparian soprani soprano sprain