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.
deewan dewan diwan dawen twain tween tweeny
sewan deewan rewan dewan wan gowany diwan rewon bwana swan gowan seawan wean rewin rowan wany wane wain hwan jawan swain twain