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.
manuals hymnals manilas manless menials maneless manillas manilles hymeneals hymnless moonless moneyless
annuals manuals annals nulls nalas vinals cannulas lunules hymnals anneals hymeneals menials pinnules renails zonulas denials toenails annuls nails canulas canals biennials finales finalis finals finials veinules venules biennales annulus pineals ranulas snails zonules tenails unnails