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.
retint retinite retained retinoid retinued rident rodent reattained radiant retuned rotund redound rotunda rattened reddened redenied redonned
tint retint stint satinet detent mediant mutant radiant patient patent nutant natant quotient dainty dint attent attaint tent taint latent stent audient potent stunt whatnot
retina retinae retine retinue ratine reattain retain retene retune rutin cretin cretonne preteen