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.
rogue roque rugae rookie raggee reggae rug rag rec rig roc reg ragg ruga rake ruck reck raga rook rock reek raku ryke
vogue rogue togue ague fugue vague gigue league maguey roque segue togae toque