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.
redone redon radon redan redden retune redeny retine retene routine retinae retinue radian ridden rotten retina retain ratton ratine rhyton ratten ratoon ratteen rattoon written reattain
redone done don vodoun dune ketone godown iodine voudoun botonee dona lowdown donee donne down dene stoney udon dine dyne tone kidney codon stone radon toney redon odeon guidon hoedown duotone tonne voudon aedine atone adown toonie showdown
redo red uredia ordo cred ired brede bred rued reedy rediae reed redia rede redd ready readd read credo reroute uredo