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.
entire entree enter entry endure entera ender endear enduro
entire gnattier snoutier snootier centre ceinture rentier mintier minaudiere pointier knottier nattier nature nettier nitre tentier denature nittier nuttier lintier snottier santir centare runtier renature miniature paintier antre jointure jauntier geniture venture entree denture daintier untrue