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.
furler frailer friller frillier variolar
birler whirler curler furler pearler hurler burler rallier drollery ruler relier broiler troller grillery coruler surlier brailler brawler cruller driller quarreler droolier growlier drawler grueller girlier marlier knurlier parlor pearlier reroller derailleur drawlier trailer whirlier trawler triller earlier gnarlier reeler crueller brawlier grueler roller caroller growler crawler rulier crawlier frillier prowler realer droller kruller quarreller raillery nearlier railer frailer burlier roilier friller griller crueler caroler curlier shriller
furl farl farle ferlie ferly frill frilly furrily