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.
cottoned coattend kittened catenate ctenidia coadunate quietened
atoned stoned toned cottoned buttoned ratooned retuned attuned latened kittened patined rattooned tondo fattened mutined heightened tautened tuned donned quietened battened neatened tondi pattened tined rattened downed redonned tyned staned mittened stound whitened