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.
reattain rattan retain ratan ratine ratany retine ratten retina ratton retinae ratteen rattoon retinue rutin redan radian ratoon retene retune rotten routine written radon redon redden redeny redone rhyton ridden
attain reattain tain betaine gittin lattin mattin rattan retain stain detain dittany titan tan tin
ratty reata bratty fretty create great pretty treat treaty rat ret