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.
caroler caroller curler cruller curlier growler crueler crawler coruler crawlier growlier crueller corollary quarreler quarreller griller grueler kruller grillery grueller
caroler furler whirler droolier surlier prowler pearler knurlier marlier growler curlier curler coruler caroller girlier hurler earlier roller burlier burler broiler birler ruler quarreler gnarlier nearlier pearlier reroller droller troller whirlier
carol caroli carl cariole carle corolla creole criollo scroll