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.
hymnals hymeneals hymnless manuals menials manilas manless maneless manillas manilles moonless
hymnals nails toenails denials renails menials nalas annals anneals annuals biennales biennials finales finalis finals finials vinals canals hymeneals manuals pineals snails tenails unnails
hymnal hymenal hymeneal hymeneally hymenial