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.
grebe grab garb grub caribe grabby grubby carb crab crib curb kerb
grebe reb tribe rebbe robe rube barbe bribe aerobe freebee foreby freebie hereby caribe ourebi probe zareba whereby
gore gree grew grey grue agree ogre