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.
rutin routine ratine retain retina retine retinae retinue reattain ratan radian ratoon retene rotten ratton ratany ratten rhyton ridden retune rattan ratteen rattoon written
rutin cutin tin matin futon beduin attain tiny tine tain patin lattin routine patine puton reattain retina satin stain zeatin tauten bedouin mutiny mouton poutine biotin satiny muton patina boudin bouton retine retain detain stein ratine mattin phytin mutine lutein latino latina gittin chitin
rut retie roti rout route rutty bruit brut brute fruit fruity pruta prutah druid