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.
squire square sucre secure suckier siker scree sugar scour skier skirr scare scaur screw score scurry sucker screwy sicker scarey soucar sugary cicoree saggier saguaro scoriae soggier
quire squire require lucre sucre square secure maugre maigre figure ligure faquir quare guiro curie cure daiquiri