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.
scourer scorer securer scarer scarier squarer sugarer scarrier sugarier sacraria
scourer corer courier curer gorier augurer figurer requirer scorer securer squarer
scour scaur score scoria scoriae scurry secure