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.
pioneer pinier pinery pinner panier panner pawner penner punier punner pannier punnier pawnor penury
pioneer bonier tonner toner zoner sneery goonier onery phonier veneer honer joiner coiner conner goner boner loaner loner loonier moaner mooner moonier owner sneer sooner downer tonier wonner
pine pion pone piney opine spine pin