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.
coruler crueler cruller crueller curler grueler curlier crawler kruller caroler caroller crawlier grueller corollary griller growler grillery growlier quarreler quarreller
coruler ruler whirler pearlier neurular knurlier morular quarreler grueler curlier curler cruller crueler caroler hurler girlier furler earlier burlier burler birler rulier kruller marlier gnarlier nearlier pearler surlier whirlier
coral corolla cruel cruelly curule