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.
crueller cruller crueler grueller kruller coruler grueler caroller curler griller caroler crawler curlier quarreller crawlier grillery corollary quarreler growler growlier
crueller grueller quarreller troller drollery driller reroller rallier crueler quarreler friller grueler grillery griller cruller caroller roller relier reeler raillery realer derailleur kruller droller frillier triller brailler shriller
cruel cruelly creel creole curule gruel