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.
knead kneed nada neat need naiad neddy needy net nod nodi nude knit node gnat nite newt nide nota nett knot note nidi wynd
knead bead beady head heady lead leady mead kneed nada neat need read readd ready dead
knee knew kana kane kina kine kuna kune