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.
reteach reattach retouch radish rattish reddish ruttish
reteach teach tach tech tache techy teuch attach attache biotech catechu outecho reattach soutache detach
rete reata retie arete reread ret