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.
rifles riffles reviles ruffles reflies refiles raffles roofless reveilles refels rivals reflows refuels refalls refills refeels raviolis reavails revalues rivulose ravels revels reveals
baffles coffles whiffles waffles riffles ruffles shuffles raffles souffles muffles piffles rifles duffles hoofless floes flus foveoles mayflies ovules cavallies beefaloes ghillies volleys fillies sighless nouvelles dayflies zoophilies devalues reviles fils shooflies defiles befleas aphyllies leafless failles lovelies reflies lifeless moveless fleas flies sawflies loopholes fleys revalues flues refels zoophiles cuffless foleys roofless tapholes vowless viewless follies defleas buffaloes feeless fellies valleys voles values peepholes vales reveilles offals felloes flews duffels refiles flees ghoulies waveless files voiles filles beefless folles loveless wifeless hiveless
rifle reflew reflow refly rifely riffle trifle