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.
niton newton neaten neoteny
niton piton chiton ton tony ketone ratton puton muttony tone beton toon titan phyton muton atony jetton rhyton seitan stone duotone whiten chitin shaitan atone town cottony mutton seton button guidon rattoon ratoon bouton betony stony cyton cotton witan mouton jeton photon phaeton futon buttony newton baton sheitan
nit knit nite nitty into onto snit unit unite unity unto