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.
wafery wafer wavery waver waiver wavier weaver woofer whiffer wiver weever weigher whoever
puffery wafery fer fry coffer gaffer huffier fere niffer fear lifer piaffer differ leafier knavery duffer feoffer faery loafer fray heifer quavery deafer deffer revery chuffier gauffer chiefer chauffer reefer chaffier chafer whiffer defray gofer fury goofier reifier refer zaffer roofer fiery sphery veery buffer coiffeur defer safer suffer reoffer quivery very iffier puffier rifer goffer ferry buffier wafer fifer defier hoofer daffier beefier refry doffer liefer every livery quaffer offer knifer reefier deifier affray woofer miffier chaffer chaufer puffer chauffeur chuffer wavery shivery
waff waffie waif wave wavey wife wifey