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.
clowder cloudier cloddier colder caldera clouter colluder collider coleader golder colter glider gladder gladier clutter gloater cloture guilder clatter coulter caldaria clattery cluttery collator killdeer kelter kilter culture glitter quilter
clowder flooder reloader loader louder bloodier bolder bowlder lewder holder folder colder golder molder older plodder polder solder