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.
ergate ergot erect eruct
rugate variegate irrigate ergate frigate derogate virgate surrogate corrugate arrogate arcuate brigade forgat furcate loricate muricate suricate torquate