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.
crudded corded curded carded gridded crowded corroded corraded grided crated graded credit carted cordate guarded crudity curated courted created crawdad cordite grouted curetted cardioid crawdaddy grated carotid curtate garoted gradate greeted gritted quirted
crudded radded readded redded ridded rodded bradded curded gridded marauded prodded shredded shrouded