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.
dead dad dado duad dada deed died daddy deedy tad did dud data dita doat dato dite dude toad daut deet dido dawt dote duet diet didy teat dodo date tide didie today deity datto toady duddy teddy doody diode dowdy toddy
bead head lead mead knead read dead ad ed