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.
outran outrun outearn outturn outthrown
outran drawn pattern outturn turn quatrain natron durian tarn tern gittern terrain terrane seatrain citron strain return diatron retorn torn train bittern patron outrun neutron cateran matron veteran bodhran vitrain drain biotron attorn cittern citrin stern retrain detrain redrawn waitron
outre outrow outer outthrew outthrow