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.
greyly grayly gruel gorily growly cruelly graal growl grill grail cruel goral curly creel carrel crawly creole gooral grille carrell gorilla quarrel queerly guerilla
greyly rely sheerly dryly wryly barely beryl ferly freely cruelly grayly queerly merely purely rarely sorely surely direly cheerly yarely
grey gore gory gray gree grew grue agree ogre