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.
dada dad dead duad data dado daddy tad dud did toad daut didy date dodo doat dita deed died dato dude dido dawt duddy today toady teddy didie dowdy doody diode deedy datto toddy