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.
loonier loner loaner linier lunier liner lanner leaner linear laniary lunar
bonier phonier loonier tonier moonier goonier funnier honer meuniere lunier goner moaner fennier coiner loaner ginnier pioneer punnier tonner runnier sunnier zoner downer tawnier tinier loner vinier panier fawnier cannier sheenier punier bonnier pinier zanier boner toner finnier pannier onery owner mooner joiner whinier veinier weenier rainier winier sooner linier denier downier teenier tinnier conner wanier wennier whinnier wonner shinier