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.
hymnless hymnals manless maneless moonless hymeneals manilles moneyless manilas manuals menials manillas
awnless painless hymnless boonless gunless kinless manless hyphenless moonless reinless sinless innless chinless townless gainless winless downless veinless nounless rainless runless sunless finless sonless unless snowless zoneless moneyless pinnules veinules aneles seniles venules maneless lineless toneless sinewless lunules anoles henleys boneless biennales penniless zonules tuneless paneless finales pinoles wineless
hymenal hymeneal hymeneally hymenial hymnal