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.
drowses drosses druses trioses dresses duresses diureses diereses derrises hydrases diaereses torses trousseaus trasses trusses tresses dieresis terrases diuresis diaeresis tarsus terces torsos traces trices truces tierces
browses drowses trioses rooses prosses neuroses grouses grosses gorses crosses corses carouses viroses horses saroses pharoses broses arouses rouses roses karosses proses rearouses soroses drosses eroses xeroses torses worses
drowse drowsy draws dross drossy duros trows