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.
retuned retinued retained rotund rotunda redound reattained ratooned rattened reddened retinite retinoid redenied redonned rattooned retint rident rodent
tuned attuned retuned latened tautened quietened stound kittened staned cottoned rotund neatened heightened rattened patined mutined fattened mittened battened pattened atoned tyned tunned toned tined dunned buttoned rotunda stoned stunned whitened
retune retene retina retinae retine retinue