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.
ouphs ouphes oafs offs
ouphs kophs typhus tophus tophes sughs sophs saughs raphis raphes ouphes loughs laughs qophs kiaughs phis kaphs coughs caphs vughs ephas aphis roughs scyphus soughs syphs tophs toughs ughs