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.
credit crudity cordite carded curded crated corded carted gordita courted crowded created crudded curated curetted corroded cardioid corraded grated graded grided garoted quartet grouted crawdad gridded gritted curtate carotid cordate greeted guarded quirted corotate garotted garreted garroted gratuity grottoed
reedit credit preedit redid aridity hybridity erudite foredid viridity heredity cordite crudity gordita preaudit torridity
credo cred ocreate curette cured curd crude cruddy crud cried creed create cord cored caret cared cardio cardiae cardia card cruet curdy curet acred screed