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.
carousal carousel carrousel crousely curiously crossly crusily crissal creosol coarsely carcel cresol cresyl coryzal crassly grossly grisaille grisly
arousal carousal rearousal bursal furiously variously carousel carrousel curiously neurosal perusal porously seriously serosal dorsal