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.
roque rogue rugae rookie rec reg roc rug rook ruga ruck rake rock reek reck raku ryke
roque toque quey aquae fique vogue caique pique rogue togue tuque cheque