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.
latterly laterally lateral literally literal littoral laetrile
bitterly latterly writerly utterly dearly truly lateral literal readerly sterol dotterel waterily
latter later letter litter littery lotter lottery blatter elater flatter flattery clatter clattery plater platter slater