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.
sacral scrawl scrawly scroll scarily scurril scurrile securely sickerly squarely skirl squirrel
sacral carl scrawl vicarial corral craal crawl curial curl gooral goral graal grail kraal aquarial augural becrawl figural coral decrial
sacra scoriae sucre scurry scry screwy screw scree scoria sacker score scary scarry scarey scare scar escrow